| Item | | Wiring diagram designation | Nominal value | | Function/ component | Terminal |
| F1 | - | Fuse 1 on fuse holder B -SB1- | 30 A | - | Control unit for reducing-agent heater -J891- | 30 |
| F2 | - | Fuse 2 on fuse holder B -SB2- | 30 A | - | Mechatronics unit for dual clutch gearbox -J743- | 30 |
| F3 | - | Fuse 3 on fuse holder B -SB3- | 5 A | - | Battery monitor control unit -J367-
Onboard supply control unit -J519- (T52a/24) | 30 |
| F4 | - | Fuse 4 on fuse holder B -SB4- | 20 A | - | ABS control unit -J104-
ABS hydraulic unit -N55- | 30 |
| F5 | - | Fuse 5 on fuse holder B -SB5- | 15 A | - | Mechatronics unit for dual clutch gearbox -J743- | 30 |
| F6 | - | Fuse 6 on fuse holder B -SB6- | 5 A | - | Control unit in dash panel insert -J285-2)
Steering column electronics control unit -J527-2) | 30 |
| F7 | - | Fuse 7 on fuse holder B -SB7- | 40 A | - | Terminal 15 voltage supply relay -J329- | t | Fuse holder C -SC- (-SC9- to -SC16- and -SC25- to -SC27- ) | | 30 |
| F8 | - | Fuse 8 on fuse holder B -SB8- | 15 A | - | Control unit with display for radio and navigation -J503-2)
Control unit 1 for information electronics -J794-2)
Radio -R-2)
USB hub -R293-2)
Voltage stabiliser -J532-1) | t | Control unit with display for radio and navigation -J503- | | t | Control unit 1 for information electronics -J794- | | t | Fuse 57 on fuse holder C -SC57- | | t | Fuse 58 on fuse holder C -SC58- | | 30 |
| F9 | - | Fuse 9 on fuse holder B -SB9- | 20 A | - | All-wheel drive control unit -J492- | 30 |
| F10 | - | Fuse 10 on fuse holder B -SB10- | 5 A | - | Engine control unit -J623-
Engine component current supply relay -J757- | 30 |
| F11 | - | Fuse 11 on fuse holder B -SB11- | 20 A | - | Auxiliary heater control unit -J364- | 30 |
| F12 | - | Fuse 12 on fuse holder B -SB12- | 5 A | - | Data bus diagnostic interface -J533- | 30 |
| F13 | - | Fuse 13 on fuse holder B -SB13- | 15 A | - | Engine control unit -J623- (petrol engine) | 87 |
| | | | 30 A | - | Engine control unit -J623- (diesel) | 87 |
| F14 | - | Fuse 14 on fuse holder B -SB14- | 10 A | - | Camshaft control valve 1 -N205- (diesel with exhaust standard Euro 6)
Fuel pressure regulating valve -N276- (diesel with exhaust standard Euro 6)
Fuel metering valve -N290- (diesel with exhaust standard Euro 6) | 87 |
| | | | 15 A | - | Fuel pressure regulating valve -N276- (diesel with exhaust standard Euro 5, Euro 4)
Fuel metering valve -N290- (diesel with exhaust standard Euro 5, Euro 4) | 87 |
| | | | 20 A | - | Ignition transformer -N152-
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 |
| F15 | - | Fuse 15 on fuse holder B -SB15- | 5 A | - | Fuel pump relay -J17-
Electric fuel pump 2 relay -J49-
Automatic glow period control unit -J179- | 87 |
| | | | 10 A | - | Lambda probe heater -Z19-
Lambda probe 1 heater after catalytic converter -Z29- | 87 |
| | | | 15 A | - | Low heat output relay -J359-
High heat output relay -J360-
Control unit for NOx sender -J583-
Lambda probe heater -Z19- | 87 |
| F16 | - | Fuse 16 on fuse holder B -SB16- | 30 A | - | Onboard supply control unit -J519- (T52c/42) | t | Right fog light bulb -L23- | | t | Right cornering light bulb -L149- | | t | Rear left fog light bulb -L46- , or Rear right fog light bulb -L47- | | t | Right daytime running light bulb -L175- | | t | Left side light bulb -M1- | | t | Right tail light bulb -M2- | | t | Rear left turn signal bulb -M6- | | t | Front right turn signal bulb -M7- | | t | Left brake light bulb -M9- | | t | Right reversing light bulb -M17- | | t | Left turn signal repeater bulb -M18- | | t | High-level brake light bulb -M25- | | t | Right headlight dipped beam bulb -M31- | | t | Right headlight main beam bulb -M32- | | 30 |
| F17 | - | Fuse 17 on fuse holder B -SB17- | 15 A | - | Horn relay -J413- | 30 |
| F18 | - | Fuse 18 on fuse holder B -SB18- | 30 A | - | Special vehicle control unit -J608- | 30 |
| F19 | - | Fuse 19 on fuse holder B -SB19- | 30 A | - | Wiper motor control unit -J400- | t | Windscreen wiper motor -V- | | 30 |
| F20 | - | Fuse 20 on fuse holder B -SB20- | 10 A | - | Fuel tank shut-off valve 1 -N361-
Fuel tank shut-off valve 2 -N362-
Fuel tank shut-off valve 3 -N363-
Fuel tank shut-off valve 4 -N429-
Fuel tank shut-off valve 5 -N430- | 30 |
| F21 | - | Fuse 21 on fuse holder B -SB21- | 10 A | - | Fuel pump relay -J17- (diesel with exhaust standard Euro 6)
Automatic glow period control unit -J179- (diesel with exhaust standard Euro 6)
Low heat output relay -J359- (diesel with exhaust standard Euro 5, Euro 4)
High heat output relay -J360- (diesel with exhaust standard Euro 5, Euro 4)
Lambda probe heater -Z19- (diesel with exhaust standard Euro 5, Euro 4) | 30 |
| | | | 15 A | - | Fuel pump control unit -J538- (petrol engine) | 87 |
| F22 | - | Fuse 22 on fuse holder B -SB22- | 5 A | - | Brake light switch -F-
Clutch position sender -G476- | 87 |
| F23 | - | Fuse 23 on fuse holder B -SB23- | 10 A | - | Air mass meter -G70-
Charge pressure control solenoid valve -N75-
Exhaust gas recirculation cooler changeover valve -N345-
Valve for oil pressure control -N428-
Coolant valve for cylinder head -N489- | 87 |
| | | | 15 A | - | Additional coolant pump relay -J496-
High-pressure valve for gas mode -N372-
Charge air cooling pump -V188- | 87 |
| F24 | - | Fuse 24 on fuse holder B -SB24- | 10 A | - | Radiator fan control unit -J293-
Relay for reducing agent metering system -J963- | t | Reducing agent level sender -G697- | | t | Pump for reducing agent -V437- | | t | Reducing agent return flow pump -V561- | Activated charcoal filter solenoid valve 1 -N80-
Camshaft control valve 1 -N205-
Gas injection valve 1 -N366-
Gas injection valve 2 -N367-
Gas injection valve 3 -N368-
Gas injection valve 4 -N369-
Valve for oil pressure control -N428-
Coolant circulation pump 2 -V178-
Charge air cooling pump -V188-
Heater support pump -V488- | 87 |
| F25 | - | Fuse 25 on fuse holder B -SB25- | 40 A | - | ABS control unit -J104-
ABS hydraulic pump -V64- | 30 |
| F26 | - | Fuse 26 on fuse holder B -SB26- | 30 A | - | Onboard supply control unit -J519- (T52a/1) | t | Left cornering light bulb -L148- | | t | Left fog light bulb -L22- | | t | Rear left fog light bulb -L46- , or Rear right fog light bulb -L47- | | t | Left daytime running light bulb -L174- | | t | Right side light bulb -M3- | | t | Left tail light bulb -M4- | | t | Front left turn signal bulb -M5- | | t | Rear right turn signal bulb -M8- | | t | Right brake light bulb -M10- | | t | Left reversing light bulb -M16- | | t | Right turn signal repeater bulb -M19- | | t | Left headlight dipped beam bulb -M29- | | t | Left headlight main beam bulb -M30- | | 30 |
| F27 | - | Fuse 27 on fuse holder B -SB27- | 50 A | - | Automatic glow period control unit -J179- | 30 |
| F28 | - | Fuse 28 on fuse holder B -SB28- | 40 A | - | Fuse 56 on fuse holder C -SC56- | t | DC/AC converter with socket, 12 V - 230 V -U13- | | 30 |
| | | | 60 A | - | Heated windscreen relay -J47- | 30 |
| F29 | - | Fuse 29 on fuse holder B -SB29- | 30 A | - | Special vehicles | t | Fuse 18 on fuse holder C -SC18- | | t | Fuse 19 on fuse holder C -SC19- | | 30 |
| | | | 50 A | - | Special vehicles | t | Fuse 39 on fuse holder C -SC39- | | t | Fuse 51 on fuse holder C -SC51- | | t | Fuse 54 on fuse holder C -SC54- | | t | Fuse 55 on fuse holder C -SC55- | | t | Fuse 59 on fuse holder C -SC59- | | t | Fuse 60 on fuse holder C -SC60- | | 30 |
| F30 | - | Fuse 30 on fuse holder B -SB30- | 50 A | - | Trailer coupling | t | Fuse 40 on fuse holder C -SC40- | | t | Fuse 41 on fuse holder C -SC41- | | t | Fuse 42 on fuse holder C -SC42- | | 30 |
| Item | | Wiring diagram designation | Nominal value | | Function/ component | Terminal |
| 1 | - | Fuse 1 on fuse holder C -SC1- | | - | | |
| 2 | - | Fuse 2 on fuse holder C -SC2- | | - | | |
| 3 | - | Fuse 3 on fuse holder C -SC3- | | - | | |
| 4 | - | Fuse 4 on fuse holder C -SC4- | | - | | |
| 5 | - | Fuse 5 on fuse holder C -SC5- | | - | | |
| 6 | - | Fuse 6 on fuse holder C -SC6- | | - | | |
| 7 | - | Fuse 7 on fuse holder C -SC7- | | - | | |
| 8 | - | Fuse 8 on fuse holder C -SC8- | | - | | |
| 9 | - | Fuse 9 on fuse holder C -SC9- | 10 A | - | Special vehicles | t | 10-pin connector -T10l- , Pin 4 (Interface for special functions) | | 15a |
| 10 | - | Fuse 10 on fuse holder C -SC10- | 5 A | - | Voltage stabiliser -J532-
Data bus diagnostic interface -J533-
Engine control unit -J623-
Starter relay 1 -J906-
Starter relay 2 -J907- | 15a |
| 11 | - | Fuse 11 on fuse holder C -SC11- | 5 A | - | Parking aid control unit -J446-
Park assist steering control unit -J791- | 15a |
| 12 | - | Fuse 12 on fuse holder C -SC12- | 5 A | - | Special vehicles | t | Mirror taximeter -G511- | | 15a |
| | | | 20 A | - | Special vehicles | t | 8-pin connector -T8k- , Pin 8 | | t | 28-pin connector -T28a- , Pin 20 | | t | 28-pin connector -T28b- , Pin 20 | | 15a |
| 13 | - | Fuse 13 on fuse holder C -SC13- | 7.5 A | - | Headlight range control regulator -E102-
Button for TCS and electronic stabilisation program -E256-
Selector lever -E313-
Tyre pressure loss indicator button -E492-
Start/Stop operation button -E693-
ABS control unit -J104-
Trailer detector control unit -J345-
Adaptive cruise control unit -J428-
All-wheel drive control unit -J492-
Power steering control unit -J500-
Mechatronics unit for dual clutch gearbox -J743-
DC/AC converter with socket, 12 V-230 V -U13-
Left headlight range control motor -V48-
Right headlight range control motor -V49- | 15a |
| 14 | - | Fuse 14 on fuse holder C -SC14- | 10 A | - | Reversing light switch -F4-
Air mass meter -G70-
Auxiliary heater operation relay -J485-
Control unit in dash panel insert -J285-
Heater element for crankcase breather -N79-
Diagnostic connection -U31-Connector, 16-pin -T16- , Pin 1 | 15a |
| 15 | - | Fuse 15 on fuse holder C -SC15- | 5 A | - | Airbag control unit -J234-
Front passenger airbag deactivated warning lamp -K145- | 15a |
| 16 | - | Fuse 16 on fuse holder C -SC16- | 5 A | - | Light switch -E1-
Heater/heat output switch -E16-
High-pressure sender -G65-
Air quality sensor -G238-
Oil level and oil temperature sender -G266-
Automatic anti-dazzle interior mirror -Y7- | 15a |
| 17 | - | Fuse 17 on fuse holder C -SC17- | | - | | |
| 18 | - | Fuse 18 on fuse holder C -SC18- | 5 A | - | Special vehicles | t | Taxi alarm remote control, control unit -J601- | | 30a |
| | | | 10 A | - | Special vehicles | t | 10-pin connector -T10l- , Pin 6 (Interface for special functions) | | BLL |
| 19 | - | Fuse 19 on fuse holder C -SC19- | 10 A | - | Special vehicles | t | Mirror taximeter -G511- | | t | Taxi alarm remote control, control unit -J601- | | 30a |
| | | | 10 A | - | Special vehicles | t | 10-pin connector -T10l- , Pin 7 (Interface for special functions) | | BLR |
| 20 | - | Fuse 20 on fuse holder C -SC20- | 20 A | - | Cigarette lighter -U1- | 30a |
| 21 | - | Fuse 21 on fuse holder C -SC21- | 10 A | - | Light switch -E1-
Heater/heat output switch -E16-
Interior illumination switch -E599- (camper)
Selector lever -E313-
Rain and light sensor -G397-
Heated rear window relay -J9-
Heated windscreen relay -J47-
Climatronic control unit -J255-
A/C control module -J301-
Horn relay -J413-
Relay for reducing agent metering system -J963-
2-way signal amplifier for mobile radio -J984-
Radio receiver for auxiliary water heater -R149-
Rearview camera -R189-
Coupling antenna for Bluetooth mobile phone -R309-
Diagnostic connection -U31-Connector, 16-pin -T16- , Pin 16
Rear interior light -W43- (camper) | 30a |
| 22 | - | Fuse 22 on fuse holder C -SC22- | 10 A | - | Onboard supply control unit -J519- (T52b/42) | t | Front interior light -W1- | | t | Luggage compartment light -W3- | | t | Glove compartment light -W6- | | t | Rear interior light -W43- | | 30a |
| 23 | - | Fuse 23 on fuse holder C -SC23- | 5 A | - | Special vehicles | t | Interior light switch (taxi) -E115- | | t | Taxi sign switch -E138- | | t | 10-pin connector -T10l- , Pin 1 (Interface for special functions) | | 30a |
| | | | 10 A | - | Special vehicles | t | Flashing lights relay -J630- | | 30a |
| 24 | - | Fuse 24 on fuse holder C -SC24- | 5 A | - | Interior monitoring sensor -G273-
Vehicle inclination sender -G384-
Anti-theft alarm sensor -G578-
Alarm horn -H12-
Onboard supply control unit -J519- (T52c/1) | 30a |
| 25 | - | Fuse 25 on fuse holder C -SC25- | 5 A | - | Control unit in dash panel insert -J285- | 15a |
| 26 | - | Fuse 26 on fuse holder C -SC26- | | - | | 15a |
| 27 | - | Fuse 27 on fuse holder C -SC27- | | - | | 15a |
| 28 | - | Fuse 28 on fuse holder C -SC28- | 20 A | - | 12 V socket 3 -U19- , in storage compartment | 75a |
| 29 | - | Fuse 29 on fuse holder C -SC29- | 15 A | - | Rear window wiper motor -V12- | 75a |
| 30 | - | Fuse 30 on fuse holder C -SC30- | | - | | 75a |
| 31 | - | Fuse 31 on fuse holder C -SC31- | 5 A | - | Heater/heat output switch -E16-
Left washer jet heater element -Z20-
Right washer jet heater element -Z21- | 75a |
| 32 | - | Fuse 32 on fuse holder C -SC32- | | - | | 75a |
| 33 | - | Fuse 33 on fuse holder C -SC33- | 30 A | - | Auxiliary heater operation relay -J485- (vehicles with auxiliary heater) | t | Heater/heat output switch -E16- | | t | Air conditioning system control unit -J301- | Heater/heat output switch -E16- | 75a |
| 34 | - | Fuse 34 on fuse holder C -SC34- | | - | | |
| 35 | - | Fuse 35 on fuse holder C -SC35- | | - | | |
| 36 | - | Fuse 36 on fuse holder C -SC36- | | - | | |
| 37 | - | Fuse 37 on fuse holder C -SC37- | | - | | |
| 38 | - | Fuse 38 on fuse holder C -SC38- | | - | | |
| 39 | - | Fuse 39 on fuse holder C -SC39- | 30 A | - | Special vehicles | t | 4-pin connector -T4ad- , Pin 1 | | 30a |
| 40 | - | Fuse 40 on fuse holder C -SC40- | 20 A | - | Trailer detector control unit -J345- | 30a |
| 41 | - | Fuse 41 on fuse holder C -SC41- | 20 A | - | Trailer detector control unit -J345- | 30a |
| 42 | - | Fuse 42 on fuse holder C -SC42- | 20 A | - | Trailer detector control unit -J345- | 30a |
| 43 | - | Fuse 43 on fuse holder C -SC43- | 15 A | - | Fuel pump relay -J17-
Fuel supply relay -J49-
Electric fuel pump 2 relay -J643- | 30a |
| | | | 20 A | - | Fuel pump relay -J17- (diesel with exhaust standard Euro 6)
Electric fuel pump 2 relay -J643- (diesel with exhaust standard Euro 6) | 30a |
| 44 | - | Fuse 44 on fuse holder C -SC44- | 40 A | - | Fresh air blower control unit -J126- | 30a |
| 45 | - | Fuse 45 on fuse holder C -SC45- | 20 A | - | Headlight washer system relay -J39- | t | Headlight washer system pump -V11- | | 30a |
| 46 | - | Fuse 46 on fuse holder C -SC46- | 10 A | - | Driver door control unit -J386- (convenience system without electric window regulators) | 30a |
| | | | 30 A | - | Driver door control unit -J386- (convenience system with electric window regulators) | 30a |
| 47 | - | Fuse 47 on fuse holder C -SC47- | 40 A | - | X-contact relief relay -J59-2) | t | Fuse holder C -SC- (-SC28- to -SC33- ) 2) | | 30a |
| 48 | - | Fuse 48 on fuse holder C -SC48- | 30 A | - | Heated front seats control unit -J774- | 30a |
| 49 | - | Fuse 49 on fuse holder C -SC49- | 10 A | - | Front passenger door control unit -J387- (convenience system without electric window regulators) | 30a |
| | | | 30 A | - | Front passenger door control unit -J387- (convenience system with electric window regulators) | 30a |
| 50 | - | Fuse 50 on fuse holder C -SC50- | 20 A | - | Onboard supply control unit -J519- | t | Rear window wiper motor -V12- | | t | Windscreen and rear window washer pump -V59- | | 30a |
| 51 | - | Fuse 51 on fuse holder C -SC51- | 15 A | - | Trailer voltage supply relay -J941- | t | Trailer socket -U10- (T13/10) | | 30a |
| | - | | 30 A | - | Special vehicles | t | 10-pin connector -T10ai- , Pin 4 | | t | 10-pin connector -T10ai- , Pin 5 | | 30a |
| 52 | - | Fuse 52 on fuse holder C -SC52- | 25 A | - | Heated rear window relay -J9- | t | Heated rear window -Z1- | | t | Heated rear window in left wing door -Z26- | | t | Heated rear window in right wing door -Z27- | Fresh air blower relay -J13- (vehicles with auxiliary heater) | t | Fresh air blower series resistor with overheating fuse -N24- | | 30a |
| 53 | - | Fuse 53 on fuse holder C -SC53- | 20 A | - | 12 V socket -U5- , in rear centre console
12 V socket 2 -U18- , in rear left side panel | 30a |
| 54 | - | Fuse 54 on fuse holder C -SC54- | 15 A | - | Special vehicles | t | Switch-over relay 1 for roof ventilator -J180- | | 30a |
| 55 | - | Fuse 55 on fuse holder C -SC55- | 15 A | - | Special vehicles | t | 8-pin connector -T8m- , Pin 4 | | t | 8-pin connector -T8n- , Pin 4 | | 30a |
| 56 | - | Fuse 56 on fuse holder C -SC56- | 30 A | - | DC/AC converter with socket, 12 V - 230 V -U13- | 30a |
| 57 | - | Fuse 57 on fuse holder C -SC57- | 5 A | - | Control unit in dash panel insert -J285-1)
Steering column electronics control unit -J527-1) | 30a |
| 58 | - | | | - | | |
| 59 | - | Fuse 59 on fuse holder C -SC59- | 5 A | - | Special vehicles | t | 2-way radio switch -E72- | | t | Ignition bypass button -E489- | | t | Button for daytime running light switch-off -E652- | | t | Accident data memory -J754- | | 30a |
| 60 | - | Fuse 60 on fuse holder C -SC60- | 30 A | - | Special vehicles | t | 3-pin connector -T3al- , Pin 1 | | 30a |
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