| -T26- (A) | Designation | | -T26- (A) | Designation |
| 1 | | | 14 | |
| 2 | CAN bus extended, high | | 15 | Right headlight range control motor -V49- |
| 3 | CAN bus extended, low | | 16 | Left headlight range control motor -V48- |
| 4 | CAN bus, high | | 17 | Left headlight range control motor -V48- |
| 5 | CAN bus, low
screen earth, USA only | | 18 | Left headlight range control motor -V48- |
| 6 | | | 19 | Left headlight range control motor -V48- |
| 7 | | | 20 | Right headlight range control motor -V49- |
| 8 | | | 21 | Right headlight range control motor -V49- |
| 9 | Screen earth, USA only | | 22 | Right headlight range control motor -V49- |
| 10 | | | 23 | Terminal 15, from fuse holder F -SF- |
| 11 | | | 24 | Terminal 31, to 675 earth point 2 on right in luggage compartment |
| 12 | | | 25 | |
| 13 | | | 26 | |
| -T16h- (A) | Designation | | -T12i- (B) | Designation | | -T12h- (C) | Designation |
| 1 | Terminal 15, from fuse holder F -SF- | | 1 | Front sender voltage supply | | 1 | |
| 2 | Rear parking aid warning buzzer -H15- | | 2 | Front sender earth | | 2 | Rear centre right parking aid sender -G205- |
| 3 | | | 3 | Front parking aid warning buzzer -H22- | | 3 | Rear centre left parking aid sender -G204- |
| 4 | Parking aid button -E266- | | 4 | Front parking aid warning buzzer -H22- | | 4 | Rear right parking aid sender -G206- |
| 5 | | | 5 | Front left parking aid sender -G255- | | 5 | Rear left parking aid sender -G203- |
| 6 | CAN bus, high | | 6 | Front centre left parking aid sender -G254- | | 6 | Rear right park assist steering sender -G717- |
| 7 | | | 7 | Front centre right parking aid sender -G253- | | 7 | |
| 8 | Terminal 31, to 51 earth point on right in luggage compartment | | 8 | Front right parking aid sender -G252- | | 8 | Rear sender earth |
| 9 | Warning light for park assist steering -K241- | | 9 | Front left sender for park assist steering on left side of vehicle -G568- | | 9 | |
| 10 | Rear parking aid warning buzzer -H15- | | 10 | Front right sender for park assist steering on right side of vehicle -G569- | | 10 | Rear left park assist steering sender -G716- |
| 11 | | | 11 | | | 11 | Rear sender voltage supply |
| 12 | | | 12 | | | 12 | |
| 13 | Parking aid warning lamp -K136- | | | | | | |
| 14 | | | | | | | |
| 15 | CAN bus, low | | | | | | |
| 16 | Park assist steering button -E581- | | | | | | |
| -T9a- (A) | Designation | | -T18b- (B) | Designation | | -T15a- (C) | Designation |
| 1 | Terminal 30, from fuse holder F -SF- | | 1 | Valve voltage supply | | 1 | Front left vehicle level sender -G78- |
| 2 | | | 2 | Front left suspension strut valve -N148- | | 2 | Front left vehicle level sender -G78- |
| 3 | Terminal 31, to 391 earth connection 26 in main wiring harness
675 earth point 2 on right in luggage compartment | | 3 | Front right suspension strut valve -N149- | | 3 | Front left vehicle level sender -G78- |
| 4 | | | 4 | Valve block | | 4 | Front right vehicle level sender -G289- |
| 5 | | | 5 | Rear left suspension strut valve -N150- | | 5 | Front right vehicle level sender -G289- |
| 6 | Terminal 15, from fuse holder F -SF- | | 6 | Rear right suspension strut valve -N151- | | 6 | Front right vehicle level sender -G289- |
| 7 | | | 7 | Valve block | | 7 | Rear left vehicle level sender -G76- |
| 8 | | | 8 | Adaptive suspension pressure accumulator valve -N311- | | 8 | Rear left vehicle level sender -G76- |
| 9 | | | 9 | Adaptive suspension compressor relay -J403- | | 9 | Rear left vehicle level sender -G76- |
| | | | 10 | | | 10 | Rear right vehicle level sender -G77- |
| | | | 11 | | | 11 | Rear right vehicle level sender -G77- |
| | | | 12 | | | 12 | Rear right vehicle level sender -G77- |
| | | | 13 | | | 13 | Pressure sender for adaptive suspension -G291- |
| | | | 14 | | | 14 | Pressure sender for adaptive suspension -G291- |
| | | | 15 | | | 15 | Pressure sender for adaptive suspension -G291- |
| | | | 16 | | | | |
| | | | 17 | | | | |
| | | | 18 | | | | |
| -T12a- (D) | Designation | | -T6b- (E) | Designation |
| 1 | Front left shock absorber damping adjustment valve -N336- | | 1 | FlexRay bus |
| 2 | Rear left shock absorber damping adjustment valve -N338- | | 2 | FlexRay bus |
| 3 | | | 3 | |
| 4 | Front left shock absorber damping adjustment valve -N336- | | 4 | Control unit for sensor electronics -J849-, high-voltage models only |
| 5 | Front right shock absorber damping adjustment valve -N337- | | 5 | Control unit for sensor electronics -J849-, high-voltage models only |
| 6 | | | 6 | |
| 7 | Rear left shock absorber damping adjustment valve -N338- | | | |
| 8 | Rear right shock absorber damping adjustment valve -N339- | | | |
| 9 | Compressor temperature sender for adaptive suspension -G290- | | | |
| 10 | Front right shock absorber damping adjustment valve -N337- | | | |
| 11 | Rear right shock absorber damping adjustment valve -N339- | | | |
| 12 | Compressor temperature sender for adaptive suspension -G290- | | | |
| -T32f- (A) | Designation | | -T32f- (A) | Designation |
| 1 | | | 17 | LIN bus, B481 connection 17 in main wiring harness |
| 2 | CAN bus extended, low | | 18 | CAN bus extended, high |
| 3 | 16-pin connector -T16-, diagnostic connection | | 19 | 16-pin connector -T16-, diagnostic connection |
| 4 | Convenience CAN bus, low | | 20 | Convenience CAN bus, high |
| 5 | Powertrain CAN bus, low | | 21 | Powertrain CAN bus, high |
| 6 | Dash panel insert CAN bus, low | | 22 | Dash panel insert CAN bus, high |
| 7 | FlexRay bus, ABS control unit -J104- | | 23 | FlexRay bus, ABS control unit -J104- |
| 8 | FlexRay bus, adaptive suspension control unit -J197-
All-wheel drive control unit -J492- | | 24 | FlexRay bus, adaptive suspension control unit -J197-
All-wheel drive control unit -J492- |
| 9 | FlexRay bus, control unit for sensor electronics -J849- | | 25 | FlexRay bus, control unit for sensor electronics -J849- |
| 10 | FlexRay bus, control unit 2 for adaptive cruise control -J850- | | 26 | FlexRay bus, control unit 2 for adaptive cruise control -J850- |
| 11 | | | 27 | |
| 12 | | | 28 | |
| 13 | Terminal 31, to 675 earth point 2 on right in luggage compartment | | 29 | Terminal 31, to 675 earth point 2 on right in luggage compartment |
| 14 | Terminal 15, from fuse holder F -SF- | | 30 | |
| 15 | | | 31 | |
| 16 | Terminal 30, from fuse holder F -SF- | | 32 | Ring break diagnostic cable
B444 connection 1 (diagnosis) in main wiring harness |
| -T16o- (A) | Designation | | -T12ag- (B) | Designation | | -T12ah- (C) | Designation |
| 1 | Front left footwell illumination bulb -L151- | | 1 | Terminal 31, to 390 earth connection 25 in main wiring harness
391 earth connection 26 in main wiring harness
675 earth point 2 on right in luggage compartment | | 1 | Rear right door ambient lighting bulb -L167- |
| 2 | Front left door ambient lighting bulb -L158- | | 2 | Light conductor for rear centre console ambient lighting -W75- | | 2 | |
| 3 | Front left door ambient lighting bulb -L158- | | 3 | Terminal 30, from fuse holder F -SF- | | 3 | Rear right footwell illumination bulb -L107- |
| 4 | Rear left footwell illumination bulb -L106- | | 4 | Terminal 30, from fuse holder F -SF- | | 4 | Front right door ambient lighting bulb -L179- |
| 5 | Light conductor for front centre console ambient lighting -W74- | | 5 | Rear right door ambient lighting bulb -L167- | | 5 | Front right door ambient lighting bulb -L179- |
| 6 | Rear left door ambient lighting bulb -L166- | | 6 | CAN bus, low
Wiring junction for convenience CAN bus, low -TV38- | | 6 | Front right footwell illumination bulb -L152- |
| 7 | Rear left door ambient lighting bulb -L166- | | 7 | | | 7 | Rear right door ambient lighting bulb -L167- |
| 8 | Light conductor for front centre console ambient lighting -W74- | | 8 | Light conductor for rear centre console ambient lighting -W75- | | 8 | Light conductor for front centre console ambient lighting -W74- |
| 9 | Front left footwell illumination bulb -L151- | | 9 | | | 9 | Rear right footwell illumination bulb -L107- |
| 10 | Front left door ambient lighting bulb -L158- | | 10 | Light conductor for rear centre console ambient lighting -W75- | | 10 | Light conductor for front right sill panel moulding ambient lighting -W68- |
| 11 | Light conductor for front left sill panel moulding ambient lighting -W67- | | 11 | Light conductor for rear right sill panel moulding ambient lighting -W70- | | 11 | Front right door ambient lighting bulb -L179- |
| 12 | Rear left footwell illumination bulb -L106- | | 12 | CAN bus, high
Wiring junction for convenience CAN bus, high -TV34- | | 12 | Front right footwell illumination bulb -L152- |
| 13 | | | | | | | |
| 14 | Rear left door ambient lighting bulb -L166- | | | | | | |
| 15 | Light conductor for rear left sill panel moulding ambient lighting -W69- | | | | | | |
| 16 | | | | | | | |
| -T32c- (E) | Designation | | -T32c- (E) | Designation |
| 1 | | | 17 | |
| 2 | B335 connection 1 (54) in main wiring harness | | 18 | Additional brake light bulb -M25- |
| 3 | Entry and start authorisation switch -E415-, up to June 2010
Release button for rear lid lock cylinder -F248- | | 19 | |
| 4 | Contact switch in lock cylinder for rear lid, anti-theft alarm system and central locking system -F124- | | 20 | Entry and start authorisation switch -E415-, up to June 2010
Entry and start authorisation button -E408-, from July 2010 |
| 5 | Engine control unit -J623- | | 21 | |
| 6 | | | 22 | |
| 7 | | | 23 | |
| 8 | | | 24 | |
| 9 | | | 25 | |
| 10 | | | 26 | Driver door control unit -J386-, high-voltage vehicles only |
| 11 | Entry and start authorisation switch -E415-, up to June 2010 | | 27 | |
| 12 | Entry and start authorisation switch -E415-, up to June 2010
Entry and start authorisation button -E408-, from July 2010 | | 28 | E26 connection (selector position P/N) in Motronic wiring harness |
| 13 | Entry and start authorisation switch -E415-, up to June 2010
Entry and start authorisation button -E408-, from July 2010 | | 29 | |
| 14 | | | 30 | |
| 15 | Control unit for electronic steering column lock -J764- | | 31 | |
| 16 | Terminal 15 voltage supply relay -J329- | | 32 | |
| -T32d- (B) | Designation | | -T32d- (B) | Designation | | -T17d- (A) | Designation |
| 1 | | | 17 | LIN bus | | 1 | Right reversing light bulb -M17-
Right reversing light bulb -M17-, USA only |
| 2 | | | 18 | LIN bus, rear lid power opening control unit -J938- | | 2 | Power latching motor for rear lid -V382- |
| 3 | Entryandstartauthorisationswitch -E415- | | 19 | Convenience CAN bus, high
Wiring junction for convenience CAN bus, high -TV34- | | 3 | |
| 4 | Heated rear window relay -J9- | | 20 | Convenience CAN bus, low
Wiring junction for convenience CAN bus, low -TV38- | | 4 | Power latching motor for rear lid -V382- |
| 5 | | | 21 | | | 5 | Rear lid central locking motor -V53- |
| 6 | | | 22 | | | 6 | Tank filler flap locking motor -V155- |
| 7 | | | 23 | | | 7 | Tank filler flap locking motor -V155- |
| 8 | | | 24 | | | 8 | Right tail light bulb 2 -M50-
Bulb 2 for right brake, turn signal and tail light -M73- |
| 9 | | | 25 | | | 9 | Left tail light bulb -M4-
Left brake, turn signal and tail light bulb -M69-, USA only |
| 10 | | | 26 | | | 10 | Right brake light bulb 2 -M87-
Right brake, turn signal and tail light bulb -M85-, USA only |
| 11 | | | 27 | | | 11 | Rear right fog light bulb -L47-
Rear right fog light bulb -L47- |
| 12 | | | 28 | | | 12 | Bulb 2 for rear left turn signal -M80- |
| 13 | | | 29 | | | 13 | |
| 14 | Number plate light -X- | | 30 | Rear right turn signal bulb -M8-
Rear right side marker bulb -M38-, USA only | | 14 | |
| 15 | Relay for power sockets -J807- | | 31 | Rear left turn signal bulb -M6-
Rear left side marker bulb -M37-, USA only | | 15 | Terminal 30, from fuse holder F -SF- |
| 16 | Alarm horn -H12- | | 32 | LIN bus,
heated windscreen control unit -J505-, roof electronics control unit -J528-, anti-theft alarm sensor -G578- | | 16 | Terminal 30, from fuse holder F -SF- |
| | | | | | | 17 | Terminal 31, to 391 earth connection 26 in main wiring harness
675 earth point 2 on right in luggage compartment |
| -T32e- (B) | Designation | | -T32e- (B) | Designation | | -T17e- (A) | Designation |
| 1 | Entry and start authorisation button -E408-, up to June 2010 | | 17 | | | 1 | Rear roller blind motor -V91- |
| 2 | | | 18 | | | 2 | Rear roller blind motor -V91- |
| 3 | Entry and start authorisation button -E408-, up to June 2010 | | 19 | | | 3 | |
| 4 | | | 20 | Power latching system limit switch, luggage compartment unlocked -F332- | | 4 | |
| 5 | Power latching system limit switch, luggage compartment locked -F333- | | 21 | | | 5 | Rear left fog light bulb -L46-
Rear left fog light bulb -L46-, USA only |
| 6 | | | 22 | | | 6 | Left tail light bulb -M9-
Left brake and turn signal bulb -M56-, USA only |
| 7 | Luggage compartment aerial for entry and start system -R137- | | 23 | | | 7 | |
| 8 | Luggage compartment aerial for entry and start system -R137- | | 24 | | | 8 | B447 connection (luggage compartment light) in main wiring harness |
| 9 | Right aerial for entry and start authorisation -R201- | | 25 | | | 9 | Left tail light bulb 2 -M49-
Bulb 2 for left brake, turn signal and tail light -M72-, USA only |
| 10 | Right aerial for entry and start authorisation -R201- | | 26 | | | 10 | Right tail light bulb -M2-
Right brake, turn signal and tail light bulb -M70-, USA only |
| 11 | Left aerial for entry and start authorisation -R200- | | 27 | | | 11 | Left tail light bulb 2 -M86-
Left brake and turn signal bulb 2 -M84-, USA only |
| 12 | Left aerial for entry and start authorisation -R200- | | 28 | | | 12 | Right brake light bulb -M10-
Right brake and turn signal bulb -M57-, USA only |
| 13 | Interior aerial 2 for entry and start system -R139- | | 29 | Contact sensor for rear right exterior door handle -G418- | | 13 | Bulb 2 for rear right turn signal -M81- |
| 14 | Interior aerial 2 for entry and start system -R139- | | 30 | Contact sensor for front right exterior door handle -G606- | | 14 | B479 connection 15 in main wiring harness |
| 15 | Interior aerial 1 for entry and start system -R138- | | 31 | Contact sensor for rear left exterior door handle -G417- | | 15 | Control unit for electronic steering column lock -J764- |
| 16 | Interior aerial 1 for entry and start system -R138- | | 32 | Contact sensor for front left exterior door handle -G605- | | 16 | Terminal 30, from fuse holder F -SF- |
| | | | | | | 17 | Terminal 31, to 391 earth connection 26 in main wiring harness
675 earth point 2 on right in luggage compartment |
| -T6bz- (B) | Designation | | -T10bg- (C) | Designation | | -T10bf- (D) | Designation |
| 1 | Terminal 30, from fuse holder F -SF- | | 1 | Terminal 15, from B281 positive connection 5 (15a) in main wiring harness
Fuse holder F -SF- | | 1 | Electric hinged tow coupling attachment button -E474- |
| 2 | Terminal 31, to 733 earth point 3 on left in luggage compartment | | 2 | Terminal 54 | | 2 | Electric hinged tow coupling attachment button -E474- |
| 3 | Terminal 30, from fuse holder F -SF- | | 3 | Convenience CAN bus, high
B397 connection 1 (convenience CAN bus, high) in main wiring harness
Wiring junction for convenience CAN bus, high -TV34- | | 3 | Electric hinged tow coupling attachment button -E474- |
| 4 | Terminal 30, from fuse holder F -SF- | | 4 | Convenience CAN bus, low
B406 connection 1 (convenience CAN bus, low) in main wiring harness
Wiring junction for convenience CAN bus, low -TV38- | | 4 | Electric hinged tow coupling attachment button -E474- |
| 5 | Terminal 30, from fuse holder F -SF- | | 5 | | | 5 | |
| 6 | Terminal 30, from fuse holder F -SF- | | 6 | | | 6 | |
| | | | 7 | | | 7 | Retracting tow ball coupling warning lamp -K212- |
| | | | 8 | | | 8 | Extending tow ball coupling warning lamp -K211- |
| | | | 9 | | | 9 | |
| | | | 10 | | | 10 | |
| -T18d- (B) | Designation | | -T38- (C) | Designation | | -T38- (C) | Designation |
| 1 | | | 1 | Terminal 30, from fuse holder F -SF- | | 20 | Front right mid-range loudspeaker -R104- |
| 2 | | | 2 | Terminal 31, to 733 earth point 3 on left in luggage compartment | | 21 | Front right treble loudspeaker -R22- |
| 3 | | | 3 | Rear right mid-range and bass loudspeaker -R160-
Rear right treble loudspeaker -R16- | | 22 | Front left treble loudspeaker -R20- |
| 4 | | | 4 | Front left bass loudspeaker -R21- | | 23 | |
| 5 | | | 5 | Subwoofer -R211- | | 24 | |
| 6 | Rear left microphone -R144- | | 6 | | | 25 | Ring break diagnostic cable
B444 connection 1 (diagnosis) in main wiring harness
Data bus diagnostic interface -J533- |
| 7 | Rear left microphone -R144- | | 7 | Front left mid-range loudspeaker -R103- | | 26 | |
| 8 | Rear right microphone -R145- | | 8 | Front right mid-range loudspeaker -R104- | | 27 | |
| 9 | Rear right microphone -R145- | | 9 | Front right treble loudspeaker -R22- | | 28 | Screen earth |
| 10 | Engine control unit -J623- | | 10 | Front left treble loudspeaker -R20- | | 29 | Internal microphone -R74- |
| 11 | Engine control unit -J623-
Power unit mounting control unit -J931- | | 11 | Front right bass loudspeaker -R23- | | 30 | Internal microphone -R74- |
| 12 | | | 12 | Front right bass loudspeaker -R23- | | 31 | Centre loudspeaker -R208- |
| 13 | Centre right microphone -R143- | | 13 | Rear left mid-range and bass loudspeaker -R159-
Rear left treble loudspeaker -R14- | | 32 | Centre loudspeaker -R208- |
| 14 | Centre right microphone -R143- | | 14 | Rear left mid-range and bass loudspeaker -R159-
Rear left treble loudspeaker -R14- | | 33 | Left effect loudspeaker -R209- |
| 15 | | | 15 | Rear right mid-range and bass loudspeaker -R160-
Rear right treble loudspeaker -R16- | | 34 | Left effect loudspeaker -R209- |
| 16 | Centre left microphone -R142- | | 16 | Front left bass loudspeaker -R21- | | 35 | |
| 17 | Centre left microphone -R142- | | 17 | Subwoofer -R211- | | 36 | |
| 18 | | | 18 | | | 37 | Right effect loudspeaker -R210- |
| | | | 19 | Front left mid-range loudspeaker -R103- | | 38 | Right effect loudspeaker -R210- |
| -T32h- (B) | Designation | | -T38- (C) | Designation |
| 1 | Digital sound package control unit 2 -J787- | | 1 | Terminal 30, from fuse holder F -SF- |
| 2 | Digital sound package control unit 2 -J787- | | 2 | Terminal 31, to 733 earth point 3 on left in luggage compartment |
| 3 | Digital sound package control unit 2 -J787- | | 3 | Front left mid-range loudspeaker -R103- |
| 4 | Digital sound package control unit 2 -J787- | | 4 | Front right mid-range loudspeaker -R104- |
| 5 | Digital sound package control unit 2 -J787- | | 5 | Rear left mid-range loudspeaker -R105- |
| 6 | Centre left microphone -R142- | | 6 | Rear right mid-range loudspeaker -R106- |
| 7 | Centre right microphone -R143- | | 7 | Centre loudspeaker -R208- |
| 8 | Rear left microphone -R144- | | 8 | Centre loudspeaker 2 -R219- |
| 9 | Internal microphone -R74- | | 9 | Rear left treble loudspeaker 2 -R217- |
| 10 | Rear right microphone -R145- | | 10 | Rear right treble loudspeaker 2 -R218- |
| 11 | Screen earth | | 11 | |
| 12 | Engine control unit -J623-
Power unit mounting control unit -J931- | | 12 | |
| 13 | | | 13 | |
| 14 | Digital sound package control unit 2 -J787- | | 14 | |
| 15 | | | 15 | Front left mid-range loudspeaker -R103- |
| 16 | Digital sound package control unit 2 -J787- | | 16 | Front right mid-range loudspeaker -R104- |
| 17 | Digital sound package control unit 2 -J787- | | 17 | Rear left mid-range loudspeaker -R105- |
| 18 | Digital sound package control unit 2 -J787- | | 18 | Rear right mid-range loudspeaker -R106- |
| 19 | Digital sound package control unit 2 -J787- | | 19 | Centre loudspeaker -R208- |
| 20 | Digital sound package control unit 2 -J787- | | 20 | Centre loudspeaker 2 -R219- |
| 21 | Digital sound package control unit 2 -J787- | | 21 | Rear left treble loudspeaker 2 -R217- |
| 22 | Centre left microphone -R142- | | 22 | Rear right treble loudspeaker 2 -R218- |
| 23 | Centre right microphone -R143- | | 23 | Front left treble loudspeaker -R20- |
| 24 | Rear left microphone -R144- | | 24 | Front right treble loudspeaker -R22- |
| 25 | Internal microphone -R74- | | 25 | Rear left treble loudspeaker -R14- |
| 26 | Rear right microphone -R145- | | 26 | Rear right treble loudspeaker -R16- |
| 27 | | | 27 | Left effect loudspeaker -R209- |
| 28 | Terminal 31, to 733 earth point 3 on left in luggage compartment | | 28 | Right effect loudspeaker -R210- |
| 29 | Ring break diagnostic cable
B444 connection 1 (diagnosis) in main wiring harness
Data bus diagnostic interface -J533- | | 29 | |
| 30 | Digital sound package control unit 2 -J787- | | 30 | |
| 31 | | | 31 | Front left treble loudspeaker -R20- |
| 32 | Digital sound package control unit 2 -J787- | | 32 | Front right treble loudspeaker -R22- |
| | | | 33 | Rear left treble loudspeaker -R14- |
| | | | 34 | Rear right treble loudspeaker -R16- |
| | | | 35 | Left effect loudspeaker -R209- |
| | | | 36 | Right effect loudspeaker -R210- |
| | | | 37 | |
| | | | 38 | |
| -T32g- (A) | Designation | | -T32g- (A) | Designation |
| 1 | Terminal 30, from fuse holder F -SF- | | 17 | Front left bass loudspeaker -R21- |
| 2 | Terminal 31, to 733 earth point 3 on left in luggage compartment | | 18 | Control motor for front left treble speaker -V344- |
| 3 | Front right bass loudspeaker -R23- | | 19 | Control motor for front right treble speaker -V345- |
| 4 | Front right bass loudspeaker -R23- | | 20 | Digital sound package control unit -J525- |
| 5 | Front left bass loudspeaker -R21- | | 21 | Control motor for front right treble speaker -V345- |
| 6 | Control motor for front left treble speaker -V344- | | 22 | Control motor for front right treble speaker -V345- |
| 7 | Control motor for front left treble speaker -V344- | | 23 | Digital sound package control unit -J525- |
| 8 | Digital sound package control unit -J525- | | 24 | Digital sound package control unit -J525- |
| 9 | Digital sound package control unit -J525- | | 25 | Digital sound package control unit -J525- |
| 10 | Digital sound package control unit -J525- | | 26 | Digital sound package control unit -J525- |
| 11 | Digital sound package control unit -J525- | | 27 | Digital sound package control unit -J525- |
| 12 | Digital sound package control unit -J525- | | 28 | Rear right bass loudspeaker -R17- |
| 13 | Digital sound package control unit -J525- | | 29 | Rear right bass loudspeaker -R17- |
| 14 | Digital sound package control unit -J525- | | 30 | Digital sound package control unit -J525- |
| 15 | Subwoofer -R211- | | 31 | Rear left bass loudspeaker -R15- |
| 16 | Subwoofer -R211- | | 32 | Rear left bass loudspeaker -R15- |
| -T16v- (A) | Designation | | -T16w- (B) | Designation |
| 1 | Terminal 30, from B250 positive connection in roof wiring harness
Fuse holder C -SC- | | 1 | Terminal 30, from B250 positive connection in roof wiring harness
Fuse holder C -SC- |
| 2 | Terminal 31, to 178 earth connection in sliding sunroof wiring harness
689 earth point at front centre of roof | | 2 | Terminal 31, to 178 earth connection in sliding sunroof wiring harness
689 earth point at front centre of roof |
| 3 | Terminal 31, to 178 earth connection in sliding sunroof wiring harness
689 earth point at front centre of roof | | 3 | Terminal 31, to 178 earth connection in sliding sunroof wiring harness
689 earth point at front centre of roof |
| 4 | | | 4 | |
| 5 | | | 5 | |
| 6 | | | 6 | |
| 7 | | | 7 | |
| 8 | | | 8 | |
| 9 | | | 9 | |
| 10 | Button 1 for roof roller blind -E584- | | 10 | Button 2 for roof roller blind -E585- |
| 11 | Sliding sunroof adjustment control unit -J245- | | 11 | Sliding sunroof adjustment control unit -J245- |
| 12 | | | 12 | |
| 13 | LIN bus, B577 connection (LIN bus) in roof wiring harness
B528 connection 1 (LIN bus) in main wiring harness
B698 connection 3 (LIN bus) in main wiring harness
Convenience system central control unit -J393- | | 13 | LIN bus, B577 connection (LIN bus) in roof wiring harness
B528 connection 1 (LIN bus) in main wiring harness
B698 connection 3 (LIN bus) in main wiring harness
Convenience system central control unit -J393- |
| 14 | Sliding sunroof adjustment control unit -J245- | | 14 | Sliding sunroof adjustment control unit -J245- |
| 15 | | | 15 | |
| 16 | | | 16 | Terminal 31, to 178 earth connection in sliding sunroof wiring harness
689 earth point at front centre of roof |
| -T3bb- (A) | Designation | | -T20h- (B) | Designation | | -T20h- (B) | Designation |
| 1 | Heated bench seat cushion for rear left seat -Z10- | | 1 | LIN bus, B711 connection 6 (LIN bus) in main wiring harness
Control unit for air ionisation system -J897-
Rear right temperature flap control motor -V314- | | 11 | Earth for control motors, 257 earth connection 2 in Climatronic wiring harness |
| 2 | Terminal 30, from fuse holder F -SF- | | 2 | Dash panel insert CAN bus, high
Wiring junction for dash panel insert CAN bus, high -TV36- | | 12 | |
| 3 | Heated bench seat cushion for rear right seat -Z12- | | 3 | Dash panel insert CAN bus, low
Wiring junction for dash panel insert CAN bus, low -TV40- | | 13 | |
| | | | 4 | Rear left chest vent temperature sender -G635- | | 14 | Rear right chest vent temperature sender -G636- |
| | | | 5 | | | 15 | |
| | | | 6 | Sender earth, 411 earth connection 2 (sender earth) in main wiring harness
433 earth connection 2 (sender earth) in Climatronic wiring harness | | 16 | Rear right seat temperature sensor -G95- |
| | | | 7 | | | 17 | Rear left seat temperature sensor -G94- |
| | | | 8 | Vent temperature sender for rear left footwell -G637- | | 18 | |
| | | | 9 | Vent temperature sender for rear right footwell -G638- | | 19 | Terminal 30, from fuse holder F -SF- |
| | | | 10 | Voltage supply to control motors
L9 connection 1 in air conditioning system wiring harness | | 20 | Terminal 31, to 387 earth connection 22 in main wiring harness
688 earth point 2 on centre tunnel |
| -T8c- (H) | Designation | | -T4ah- (C) | Designation |
| 1 | Rear right mid-range and bass loudspeaker -R160-, rear right treble loudspeaker -R16- | | 1 | Aerial amplifier 2 -R111- |
| 2 | Front right bass loudspeaker -R23-, front right treble loudspeaker -R22- | | 2 | Screen earth |
| 3 | Front left bass loudspeaker -R21-, front left treble loudspeaker -R20- | | 3 | Aerial amplifier -R24- |
| 4 | Rear left mid-range and bass loudspeaker -R159-, rear left treble loudspeaker -R14- | | 4 | Screen earth |
| 5 | Rear right mid-range and bass loudspeaker -R160-, rear right treble loudspeaker -R16- | | | |
| 6 | Front right bass loudspeaker -R23-, front right treble loudspeaker -R22- | | | |
| 7 | Front left bass loudspeaker -R21-, front left treble loudspeaker -R20- | | | |
| 8 | Rear left mid-range and bass loudspeaker -R159-, rear left treble loudspeaker -R14- | | | |
| -T12u- (F) | Designation | | -T10h- (E) | Designation |
| 29 | Multimedia system operating unit 2 -E499-, headphone output, RSE | | 9 | Subwoofer -R211- |
| 30 | | | 10 | Centre loudspeaker -R208- |
| 31 | Multimedia system operating unit 2 -E499-, headphone output, RSE | | 11 | Ring break diagnostic cable
B444 connection 1 (diagnosis) in main wiring harness
Data bus diagnostic interface -J533- |
| 32 | | | 12 | |
| 33 | | | 13 | Subwoofer -R211- |
| 34 | Multimedia system operating unit 2 -E499-, headphone output, RSE | | 14 | Centre loudspeaker -R208- |
| 35 | Multimedia system operating unit 2 -E499-, headphone output, RSE | | 15 | |
| 36 | Multimedia system operating unit 2 -E499-, headphone output, RSE | | 16 | |
| 37 | Multimedia system operating unit 2 -E499-, headphone output, RSE | | 41 | Terminal 31, to 391 earth connection 26 in main wiring harness
675 earth point 2 on right in luggage compartment |
| 38 | Multimedia system operating unit 2 -E499-, headphone output, RSE | | 42 | Terminal 30, from fuse holder F -SF-
Voltage stabilizer -J532- |
| 39 | Multimedia system operating unit 2 -E499-, headphone output, RSE | | | |
| 40 | Multimedia system operating unit 2 -E499-, headphone output, RSE | | | |
| No. | | Current flow diagram designation | Nominal value | | Function/component | Terminal |
| 1 | - | Fuse 1 on fuse holder A -SA1- | 5 A 1) 2)
10 A 3) | - | Air mass meter -G70-1) 2)
Air mass meter 2 -G246-1) 2)
Secondary air pump relay -J299-3)
Left electrohydraulic engine mounting solenoid valve -N144-3)
Right electrohydraulic engine mounting solenoid valve -N145-3)
Charge air cooling pump -V188-3) | 87 |
| 2 | - | Fuse 2 on fuse holder A -SA2- | 5 A 2) 3) | - | Exhaust flap control unit -J883-2) 3)
Exhaust flap control unit 2 -J945-2) 3) | 87 |
| 3 | - | Fuse 3 on fuse holder A -SA3- | 20 A3) 4) 5)
30 A 1) 2) 6) 7) | - | Ignition coil 1 with output stage -N70-
Ignition coil 2 with output stage -N127-
Ignition coil 3 with output stage -N291-
Ignition coil 4 with output stage -N292-
Ignition coil 5 with output stage -N323-
Ignition coil 6 with output stage -N324-
Ignition coil 7 with output stage -N325-1) 2) 6) 7)
Ignition coil 8 with output stage -N326-1) 2) 6) 7)
Ignition coil 9 with output stage -N327-1) 2)
Ignition coil 10 with output stage -N328-1) 2)
Ignition coil 11 with output stage -N329-1) 2)
Ignition coil 12 with output stage -N330-1) 2) | 87 |
| 4 | - | Fuse 4 on fuse holder A -SA4- | 10 A1) 4) 5) 6) 7) | - | Fuel metering valve -N290-1) 4) 5) 6) 7)
Fuel metering valve 2 -N402-1) 6) 7) | 87 |
| 5 | - | Fuse 5 on fuse holder A -SA5- | 5 A | - | Radiator fan control unit -J293-
Radiator fan control unit 2 -J671-
Fuel pump relay -J17- | 87 |
| 6 | - | Fuse 6 on fuse holder A -SA6- | 5 A | - | Brake light switch -F-
Exhaust flap control unit -J883-7) 8)
Exhaust flap control unit 2 -J945-7) 8)
Exhaust flap 1 valve -N321-9) 10)
Exhaust flap 2 valve -N322-9) 10) | 87 |
| 7 | - | Fuse 7 on fuse holder A -SA7- | 10 A1) 2) 3) 4)
15 A5) 6) 7) | - | Camshaft control valve 1 -N205-
Camshaft control valve 2 -N208-
Exhaust camshaft control valve 1 -N318-1) 2) 3) 5) 6) 7)
Exhaust camshaft control valve 2 -N319-1) 2) 3) 5) 6) 7)
Charge pressure control solenoid valve -N75-7)
Intake manifold flap valve -N316-3) 4)
Actuators for camshaft adjustment-F366- … -F377-5)
Continued coolant circulation pump -V51-1) 2) | 87 |
| 8 | - | Fuse 8 on fuse holder A -SA8- | 5 A | - | Oil level and oil temperature sender -G266- | 87 |
| 9 | - | Fuse 9 on fuse holder A -SA9- | 15 A | - | Engine control unit -J623-
Engine control unit 2 -J624-1) 2) | 87 |
| 10 | - | Fuse 10 on fuse holder A -SA10- | 15 A
20 A3) | - | Lambda probe heater -Z19-
Lambda probe heater 2 -Z28-
Lambda probe heater 3 -Z62-1) 2)
Lambda probe heater 4 -Z63-1) 2) | 87 |
| 11 | - | Fuse 11 on fuse holder A -SA11- | 15 A | - | Map-controlled engine cooling system thermostat -F265-6) 7)
Cam adjuster for cylinder -F452- … -F459-7)
Cam adjuster for cylinder 5 -F464- … -F467-7)
Cam adjuster for cylinder 8 -F476- … -F479-7)
Secondary air pump relay -J299-1) 2) 4) 5) 6) 7)
Secondary air pump relay 2 -J545-1) 2)
Heater element for crankcase breather -N79-1) 2)
Activated charcoal filter solenoid valve 1 -N80-
Secondary air inlet valve -N112-3) 4) 5) 6) 7)
Activated charcoal filter solenoid valve 2 -N115-2)
Left electrohydraulic engine mounting solenoid valve -N144-1) 4) 5) 6)
Right electrohydraulic engine mounting solenoid valve -N145-1) 4) 5) 6)
Variable intake manifold changeover valve -N156-5) 6)
Turbocharger air recirculation valve -N249-7)
Gearbox mounting valve 1 -N262-1) 2) 6) 7)
Gearbox mounting valve 2 -N263-1) 2) 6) 7)
Intake manifold flap valve -N316-3) 4)
Secondary air inlet valve 2 -N320-4) 6) 7)
Exhaust flap 1 valve -N321-1) 4) 5)
Exhaust flap 2 valve -N322-1)
Exhaust gas recirculation cooler changeover valve -N345-4)
Magnetic clutch for compressor -N421-3)
Turbocharger air recirculation valve, cylinder bank 2 -N427-7)
Valve for oil pressure control -N428-
Coolant valve for gearbox -N488-6) 7)
Coolant valve for cylinder head -N489-6) 7)
Solenoid valve for coolant circuit -N492-3) 5)
Gearbox oil cooling valve -N509-2) 3) 4) 5) 6) 7)
Piston cooling jet control valve -N522-7)
Crankcase breather shut-off valve -N548-3) 4) 5) 9)
Engine oil cooler valve -N554-3)
Continued coolant circulation pump -V51-6) 7)
Continued coolant circulation pump 2 -V178-7)
Charge air cooling pump -V188-4) 7) | 87 |
| 12 | - | Fuse 12 on fuse holder A -SA12- | 15 A
20 A3) | - | Lambda probe 1 heater after catalytic converter -Z29-
Lambda probe 2 heater after catalytic converter -Z30-
Lambda probe 3 heater after catalytic converter -Z64-1) 2)
Lambda probe 4 heater after catalytic converter -Z65-1) 2) | 87 |
| No. | | Current flow diagram designation | Nominal value | | Function/component | Terminal |
| 1 | - | Fuse 1 on fuse holder A -SA1- | 5 A | - | Air mass meter -G70-
Air mass meter 2 -G246-1) 6) | 87 |
| 2 | - | Fuse 2 on fuse holder A -SA2- | 5 A 3) 6)
10 A 7) | - | Control unit for NOx sender -J583-3) 6)
Control unit for NOx sender 2 -J881-3) 6) 7)
Particulate sensor -G784-3)
Control unit for reducing agent metering system -J880-3) 6) 7)
Catalytic converter heater control unit 1 -T17g- Coupling station, electronics box in engine compartment 2) | 87 |
| 3 | - | not assigned | | - | | |
| 4 | - | Fuse 4 on fuse holder A -SA4- | 15 A | - | Engine control unit -J623-
Engine control unit 2 -J624-1) 6) | 87 |
| 5 | - | Fuse 5 on fuse holder A -SA5- | 5 A | - | Radiator fan control unit -J293-
Radiator fan control unit 2 -J671-
Fuel pump relay -J17- | 87 |
| 6 | - | Fuse 6 on fuse holder A -SA6- | 5 A | - | Brake light switch -F- | 87 |
| 7 | - | Fuse 7 on fuse holder A -SA7- | 10 A 1) 6) | - | Glow period control unit 2 -J703-1) 6)
Left electrohydraulic engine mounting solenoid valve -N144-1) 6)
Gearbox mounting valve 2 -N263-1) 6)
Coolant valve for gearbox -N488-1) 4)
Gearbox oil cooling valve -N509-1) 6) | 87 |
| 8 | - | Fuse 8 on fuse holder A -SA8- | 5 A | - | Oil level and oil temperature sender -G266- | 87 |
| 9 | - | Fuse 9 on fuse holder A -SA9- | 10 A | - | Gearbox mounting valve 1 -N262-1) 4)
Fuel pressure regulating valve -N276-
Fuel metering valve -N290- | 87 |
| 10 | - | Fuse 10 on fuse holder A -SA10- | 15 A
10 A7) | - | Lambda probe heater -Z19-
Lambda probe 2 heater -Z28-1) 6) | 87 |
| 11 | - | Fuse 11 on fuse holder A -SA11- | 15 A | - | Automatic glow period control unit -J179-
Right electrohydraulic engine mounting solenoid valve -N145-
Exhaust gas recirculation cooler changeover valve -N345-
Valve for oil pressure control -N428-
Coolant valve for cylinder head -N489-
17-pin connector -T17h- Coupling station, electronics box in engine compartment 1) 4)
17-pin connector -T17g- Coupling station, electronics box in engine compartment 7)
Variable intake manifold changeover valve 2 -N261-2)
Map-controlled engine cooling system thermostat -F265-2) 3) 7)
Left electrohydraulic engine mounting solenoid valve -N144-2) 3) 7)
Gearbox oil cooling valve -N509-2) 3) 7)
Gearbox mounting valve 1 -N262-1) 5) 6) | 87 |
| 12 | - | Fuse 12 on fuse holder A -SA12- | 15 A 1) 6) | - | Continued coolant circulation pump -V51-1) 4)
Pump for exhaust gas recirculation cooler -V400- | 87 |
| No. | | Current flow diagram designation | Nominal value | | Function/component | Terminal |
| 1 | - | not assigned | | - | | |
| 2 | - | Fuse 2 on fuse holder A -SA2- | 5 A | - | Low-temperature circuit coolant pump -V468- | 87 |
| 3 | - | Fuse 3 on fuse holder A -SA3- | 20 A | - | Ignition coil 1 with output stage -N70-
Ignition coil 2 with output stage -N127-
Ignition coil 3 with output stage -N291-
Ignition coil 4 with output stage -N292- | 87 |
| 4 | - | Fuse 4 on fuse holder A -SA4- | 10 A | - | Fuel pressure regulating valve -N276-
Solenoid for coolant circuit -N492- | 87 |
| 5 | - | Fuse 5 on fuse holder A -SA5- | 5 A | - | Radiator fan control unit -J293-
Radiator fan control unit 2 -J671-
Fuel pump relay -J17- | 87 |
| 6 | - | Fuse 6 on fuse holder A -SA6- | 5 A | - | Brake light switch -F-
Exhaust flap control unit -J883-
Exhaust flap control unit 2 -J945- | 87 |
| 7 | - | Fuse 7 on fuse holder A -SA7- | 15 A | - | Actuator for camshaft adjustment -F366- … -F373-
Secondary air pump relay -J299-
Charge pressure control solenoid valve -N75-
Activated charcoal filter solenoid valve 1 -N80-
Secondary air inlet valve -N112-
Left electrohydraulic engine mounting solenoid -N144-
Right electrohydraulic engine mounting solenoid -N145-
Camshaft control valve 1 -N205-
Turbocharger air recirculation valve -N249-
Gearbox mounting valve 1 -N262-
Gearbox mounting valve 2 -N263-
Intake manifold flap valve -N316-
Valve for oil pressure control -N428-
Continued coolant circulation pump -V51-
Continued coolant circulation pump -V50-
Coolant pump for high-temperature circuit -V467- | 87 |
| 8 | - | Fuse 8 on fuse holder A -SA8- | 5 A | - | Oil level and oil temperature sender -G266- | 87 |
| 9 | - | Fuse 9 on fuse holder A -SA9- | 15 A | - | Engine control unit -J623- | 87 |
| 10 | - | Fuse 10 on fuse holder A -SA10- | 15 A | - | Lambda probe heater -Z19-
Lambda probe 1 heater after catalytic converter -Z29- | 87 |
| 11 | - | Fuse 11 on fuse holder A -SA11- | 5 A | - | Brake pedal position sender -G100- | 87 |
| 12 | - | not assigned | | - | | |
| No. | | Current flow diagram designation | Nominal value | | Function/component | Terminal |
| 1 | - | Fuse 1 on fuse holder B -SB1- | 5 A | - | Anti-theft alarm sensor -G578-
Alarm horn -H12- | 30 |
| 2 | - | Fuse 2 on fuse holder B -SB2- | 20 A | - | Rear sliding sunroof control unit -J392-
Rear sliding sunroof motor -V146- | 30 |
| 3 | - | Fuse 3 on fuse holder B -SB3- | 40 A | - | Fresh air blower control unit -J126- | 30 |
| 4 | - | Fuse 4 on fuse holder B -SB4- | 20 A | - | Sliding sunroof adjustment control unit -J245-
Sliding sunroof motor -V1- | 30 |
| 5 | - | Fuse 5 on fuse holder B -SB5- | 40 A | - | Sunroof roller blind control unit -J394-
Sunroof roller blind control unit 2 -J867-
Sunroof roller blind motor -V260- | 30 |
| 6 | - | Fuse 6 on fuse holder B -SB6- | 7.5 A | - | Roof electronics control unit -J528- | 30 |
| 7 | - | Fuse 7 on fuse holder B -SB7- | 7.5 A1) | - | Front passenger door control unit -J387-1) | 30 |
| 8 | - | Fuse 8 on fuse holder B -SB8- | 30 A | - | Front passenger door control unit -J387- | 30 |
| 9 | - | Fuse 9 on fuse holder B -SB9- | 10 A | - | ABS control unit -J104- | 30 |
| 10 | - | Fuse 10 on fuse holder B -SB10- | 25 A | - | ABS control unit -J104- | 30 |
| 11 | - | Fuse 11 on fuse holder B -SB11- | 30 A | - | Rear left door control unit -J388- | 30 |
| 12 | - | Fuse 12 on fuse holder B -SB12- | 15 A
7.5 A2) | - | Control unit for front left multicontour seat -J873- | 30 |
| No. | | Current flow diagram designation | Nominal value | | Function/component | Terminal |
| 1 | - | Fuse 1 on fuse holder C -SC1- | 5 A | - | Light switch -E1- | 30 |
| 2 | - | Fuse 2 on fuse holder C -SC2- | 5 A | - | Entryandstartauthorisationswitch -E415- | 30 |
| 3 | - | Fuse 3 on fuse holder C -SC3- | 7.5 A1) | - | Rear right door control unit -J389-1) | 30 |
| 4 | - | not assigned | | - | | |
| 5 | - | Fuse 5 on fuse holder C -SC5- | 15 A | - | Horn relay -J413-
Treble horn -H2-
Bass horn -H7- | 30 |
| 6 | - | Fuse 6 on fuse holder C -SC6- | 5 A | - | Engine control unit -J623-
Engine control unit 2 -J624- | 30 |
| 7 | - | not assigned | | - | | |
| 8 | - | Fuse 8 on fuse holder C -SC8- | 10 A | - | Steering column electronics control unit -J527- | 30 |
| 9 | - | not assigned | | - | | |
| 10 | - | Fuse 10 on fuse holder C -SC10- | 5 A | - | Control unit for electronic steering column lock -J764- | 30 |
| 11 | - | Fuse 11 on fuse holder C -SC11- | 7.5 A1) | - | Driver door control unit -J386-1) | 30 |
| 12 | - | Fuse 12 on fuse holder C -SC12- | 10 A | - | Rain and light sensor -G397-
16-pin connector -T16- , diagnostic connector | 30 |
| 13 | - | Fuse 13 on fuse holder C -SC13- | 5 A | - | Remote control receiver for auxiliary heater -R64- | 30 |
| 14 | - | Fuse 14 on fuse holder C -SC14- | 25 A | - | Control unit for electrically adjustable steering column -J866-
Steering column vertical adjustment motor -V123-
Steering column axial adjustment motor -V124- | 30 |
| 15 | - | Fuse 15 on fuse holder C -SC15- | 20 A | - | Onboard supply control unit -J519- | 30 |
| 16 | - | Fuse 16 on fuse holder C -SC16- | 15 A | - | Brake servo relay -J569-
Vacuum pump for brakes -V192- | 30 |
| No. | | Current flow diagram designation | Nominal value | | Function/component | Terminal |
| 1 | - | Fuse 1 on fuse holder C -SC1- | 30 A | - | Onboard supply control unit -J519- | 30 |
| 2 | - | Fuse 2 on fuse holder C -SC2- | 30 A | - | Wiper motor control unit -J400- | 30 |
| 3 | - | Fuse 3 on fuse holder C -SC3- | 30 A | - | Onboard supply control unit -J519- | 30 |
| 4 | - | Fuse 4 on fuse holder C -SC4- | 35 A | - | Motronic current supply relay -J271-
Terminal 30 voltage supply relay -J317-
Engine components current supply relay -J757- | 30 |
| 5 | - | Fuse 5 on fuse holder C -SC5- | 30 A | - | Driver door control unit -J386-
Driver side window regulator motor -V147- | 30 |
| 6 | - | Fuse 6 on fuse holder C -SC6- | 15 A
7.5 A 1) | - | Control unit for front right multicontour seat -J872- | 30 |
| 7 | - | Fuse 7 on fuse holder C -SC7- | 15 A | - | Automatic gearbox control unit -J217- | 30 |
| 8 | - | Fuse 8 on fuse holder C -SC8- | 35 A | - | Active steering control unit -J792- | 30 |
| 9 | - | Fuse 9 on fuse holder C -SC9- | 30 A | - | Onboard supply control unit -J519- | 30 |
| 10 | - | Fuse 10 on fuse holder C -SC10- | 35 A | - | Onboard supply control unit -J519- | 30 |
| 11 | - | Fuse 11 on fuse holder C -SC11- | 30 A | - | Rear right door control unit -J389-
Rear right window regulator motor -V27- | 30 |
| 12 | - | Fuse 12 on fuse holder C -SC12- | 30 A | - | Auxiliary heater control unit -J364- | 30 |
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