| J9 | Heated rear window relay |
| J104 | ABS with EDL control unit |
| J345 | Trailer detection control unit |
| J389 | Rear right door control unit |
| J446 | Parking aid control unit |
| J519 | Onboard supply control unit |
| J526 | Telephone and Telematics control unit |
| J605 | Rear lid control unit |
| J646 | Transfer gearbox control unit |
| SC1 | Fuse 1 on fuse holder |
| SC2 | Fuse 2 on fuse holder |
| SC3 | Fuse 3 on fuse holder |
| SC4 | Fuse 4 on fuse holder |
| SC5 | Fuse 5 on fuse holder |
| SC6 | Fuse 6 on fuse holder |
| SC7 | Fuse 7 on fuse holder |
| SC14 | Fuse 14 on fuse holder |
| SC15 | Fuse 15 on fuse holder |
| SC16 | Fuse 16 on fuse holder |
| SC17 | Fuse 17 on fuse holder |
| SC18 | Fuse 18 on fuse holder |
| T4ac | 4-pin connector, right B-pillar coupling station |
| T6aj | 6-pin connector |
| T6d | 6-pin connector |
| T10ad | 10-pin connector |
| T12c | 12-pin connector |
| T12h | 12-pin connector |
| T18a | 18-pin connector |
| T20 | 20-pin connector |
| T47a | 47-pin connector |
| T47b | 47-pin connector |
| U10 | Towing coupling socket |
| W3 | Luggage compartment light |
| B301 | Positive connection 5 (30), in main wiring harness |
| W20 | Positive connection (30a), in rear wiring harness |
| * | Trailer coupling 'Hella' |
| ** | Trailer coupling 'Westfalia' |
| E... | Front passenger seat adjustment buttons |
| E265 | Rear Climatronic control and display unit |
| E290 | Front passenger seat height adjustment switch |
| H12 | Alarm horn |
| J131 | Driver seat heater control unit |
| J132 | Front passenger seat heater control unit |
| J255 | Climatronic control unit |
| J301 | Air conditioning system control unit |
| J521 | Front passenger seat adjustment control unit with memory |
| SC21 | Fuse 21 on fuse holder |
| SC22 | Fuse 22 on fuse holder |
| SC23 | Fuse 23 on fuse holder |
| SC24 | Fuse 24 on fuse holder |
| SC25 | Fuse 25 on fuse holder |
| T10i | 10-pin connector, green, front right footwell |
| T10n | 10-pin connector, black, front right seat |
| T12cb | 12-pin connector |
| T16cb | 16-pin connector |
| T17 | 17-pin connector, black, under dash panel above blower motor |
| B301 | Positive connection 5 (30), in main wiring harness |
| B324 | Positive connection 10 (30a), in main wiring harness |
| B331 | Positive connection 17 (30a), in main wiring harness |
| M18 | Connection 1, in front passenger seat adjustment wiring harness |
| * | Applies only to models with Climatronic |
| ** | Applies only to models with a manually operated air conditioning system |
| --- | Applies only to models with seat adjustment with no memory |
| J197 | Self-levelling suspension control unit |
| J217 | Automatic gearbox control unit |
| J387 | Front passenger door control unit |
| J389 | Rear right door control unit |
| J519 | Onboard supply control unit |
| J603 | Vehicle position detection control unit |
| J605 | Rear lid control unit |
| J702 | Roof display unit |
| J714 | Rear lid power latching relay |
| SC27 | Fuse 27 on fuse holder |
| SC29 | Fuse 29 on fuse holder |
| SC30 | Fuse 30 on fuse holder |
| SC31 | Fuse 31 on fuse holder |
| SC32 | Fuse 32 on fuse holder |
| SC34 | Fuse 34 on fuse holder |
| SC35 | Fuse 35 on fuse holder |
| SC36 | Fuse 36 on fuse holder |
| T4at | 4-pin connector, right A-pillar coupling station |
| T5e | 5-pin connector, right A-pillar coupling station |
| T5i | 5-pin connector, right B-pillar coupling station |
| T6d | 6-pin connector |
| T23 | 23-pin connector |
| B301 | Positive connection 5 (30), in main wiring harness |
| B325 | Positive connection 11 (30a), in main wiring harness |
| B331 | Positive connection 17 (30a), in main wiring harness |
| B332 | Positive connection 18 (30a), in main wiring harness |
| * | Applies only to models with an automatic gearbox |
| A | Battery |
| B | Starter |
| C | Alternator |
| E74 | Battery master/isolator switch |
| J234 | Airbag control unit |
| J403 | Self-levelling suspension compressor relay |
| J519 | Onboard supply control unit |
| SD1 | Fuse 1 on fuse holder |
| SD2 | Fuse 2 on fuse holder |
| SD3 | Fuse 3 on fuse holder |
| SD5 | Fuse 5 on fuse holder |
| SD9 | Fuse 9 on fuse holder |
| SD11 | Fuse 11 on fuse holder * |
| SD13 | Fuse 13 on fuse holder |
| T4r | 4-pin connector, on battery master/isolator switch |
| T16p | 16-pin connector |
| T26a | 26-pin connector |
| TV2 | Terminal 30 wiring junction |
| TV22 | Terminal 30 wiring junction 2 |
| TV28 | Terminal 30 wiring junction 3 |
| 34 | Earth point, under driver seat |
| B298 | Positive connection 2 (30), in main wiring harness |
| B301 | Positive connection 5 (30), in main wiring harness |
| * | Only applies to engine code AYH |
| J32 | Air conditioning system relay |
| J160 | Recirculation pump relay |
| J162 | Heater control unit |
| J486 | Fresh air blower 2nd speed relay |
| R149 | Auxiliary coolant heater remote control receiver |
| SB1 | Fuse 1 on fuse holder |
| SB2 | Fuse 2 on fuse holder |
| SB3 | Fuse 3 on fuse holder |
| SB4 | Fuse 4 on fuse holder |
| SB5 | Fuse 5 on fuse holder |
| SB55 | Fuse 55 on fuse holder |
| SB56 | Fuse 56 on fuse holder |
| U1 | Cigarette lighter |
| U9 | Rear cigarette lighter |
| U18 | 12 V socket 2, on front of centre console |
| U19 | Rear 12 V socket 3 |
| U20 | Rear right 12 V socket 4 |
| V305 | Front blower regulation (Bitron) motor |
| B298 | Positive connection 2 (30), in main wiring harness |
| B318 | Positive connection 4 (30a), in main wiring harness |
| B326 | Positive connection 12 (30a), in main wiring harness |
| B327 | Positive connection 13 (30a), in main wiring harness |
| * | Applies only to models with an auxiliary heater |
| ** | Applies only to models with a manually operated air conditioning system |
| J39 | Headlight washer system relay |
| J386 | Driver door control unit |
| J388 | Rear left door control unit |
| J519 | Onboard supply control unit |
| J605 | Rear lid control unit |
| SB7 | Fuse 7 on fuse holder |
| SB8 | Fuse 8 on fuse holder |
| SB9 | Fuse 9 on fuse holder |
| SB10 | Fuse 10 on fuse holder |
| SB11 | Fuse 11 on fuse holder |
| SB12 | Fuse 12 on fuse holder |
| SB14 | Fuse 14 on fuse holder |
| SB15 | Fuse 15 on fuse holder |
| SB16 | Fuse 16 on fuse holder |
| SB17 | Fuse 17 on fuse holder |
| SB18 | Fuse 18 on fuse holder |
| SB19 | Fuse 19 on fuse holder |
| T4b | 4-pin connector |
| T6a | 6-pin connector |
| T6d | 6-pin connector |
| T6q | 6-pin connector |
| T6r | 6-pin connector |
| T16b | 16-pin connector, self-diagnosis connection in driver footwell |
| T23 | 23-pin connector |
| V | Windscreen wiper motor |
| B298 | Positive connection 2 (30), in main wiring harness |
| B321 | Positive connection 7 (30a), in main wiring harness |
| B322 | Positive connection 8 (30a), in main wiring harness |
| E74 | Battery master and isolator switch |
| F36 | Clutch pedal switch |
| J... | Engine control unit |
| J234 | Airbag control unit |
| J285 | Control unit in dash panel insert |
| J502 | Tyre pressure monitor control unit |
| J508 | ESP brake light suppression relay |
| J518 | Entry and start authorisation control unit |
| J519 | Onboard supply control unit |
| J527 | Steering column electronics control unit |
| J647 | Differential transverse lock-up control unit |
| SB22 | Fuse 22 on fuse holder |
| SB23 | Fuse 23 on fuse holder |
| SB24 | Fuse 24 on fuse holder |
| SB25 | Fuse 25 on fuse holder |
| SB26 | Fuse 26 on fuse holder |
| T4y | 4-pin connector |
| T6u | 6-pin connector |
| T26a | 26-pin connector |
| T37c | 37-pin connector |
| T47c | 47-pin connector |
| B278 | Positive connection 2 (15a), in main wiring harness |
| B289 | Positive connection 13 (15a), in main wiring harness |
| B292 | Positive connection 16 (15a), in main wiring harness |
| B298 | Positive connection 2 (30), in main wiring harness |
| * | Applies only to models with a manual gearbox |
| F | Brake light switch |
| G209 | Anti-theft warning system ultra-sonic sensor |
| G384 | Vehicle inclination sender |
| J9 | Heated rear window relay |
| J32 | Air conditioning system relay |
| J83 | Heated seat relay |
| J285 | Control unit in dash panel insert |
| J518 | Entry and start authorisation control unit |
| J519 | Onboard supply control unit |
| J527 | Steering column electronics control unit |
| SB33 | Fuse 33 on fuse holder |
| SB34 | Fuse 34 on fuse holder |
| SB35 | Fuse 35 on fuse holder |
| SB36 | Fuse 36 on fuse holder |
| SB38 | Fuse 38 on fuse holder |
| SB39 | Fuse 39 on fuse holder |
| SB40 | Fuse 40 on fuse holder |
| SB41 | Fuse 41 on fuse holder |
| T6d | 6-pin connector |
| T16a | 16-pin connector |
| T16p | 16-pin connector |
| T32a | 32-pin connector, blue, on dash panel insert |
| T81 | 81-pin connector |
| B298 | Positive connection 2 (30), in main wiring harness |
| B315 | Positive connection 1 (30a), in main wiring harness |
| B328 | Positive connection 14 (30a), in main wiring harness |
| B330 | Positive connection 16 (30a), in main wiring harness |
| * | Applies only to models with a manually operated air conditioning system |
| E... | Driver seat adjustment buttons |
| J136 | Seat adjustment and steering column adjustment control unit with memory |
| J215 | Rear left heated seat control unit |
| J216 | Rear right heated seat control unit |
| J236 | Servotronic control unit |
| J245 | Sliding sunroof control unit |
| J647 | Differential transverse lock-up control unit |
| N79 | Crankcase breather heater element |
| N112 | Secondary air inlet valve |
| SB42 | Fuse 42 on fuse holder |
| SB44 | Fuse 44 on fuse holder |
| SB45 | Fuse 45 on fuse holder |
| SB47 | Fuse 47 on fuse holder |
| SB49 | Fuse 49 on fuse holder |
| SB50 | Fuse 50 on fuse holder |
| SB57 | Fuse 57 on fuse holder |
| T10f | 10-pin connector, red, E-box in engine compartment |
| T47c | 47-pin connector |
| V306 | Rear blower regulation (Bitron) motor |
| B273 | Positive connection (15), in main wiring harness |
| B298 | Positive connection 2 (30), in main wiring harness |
| B323 | Positive connection 9 (30a), in main wiring harness |
| D52 | Positive connection (15a), in engine compartment wiring harness |
| * | Only with engine code AZZ |
| ** | Applies only to models with seat adjustment with no memory |
| E1 | Light switch |
| E102 | Headlight range control adjuster |
| E231 | Exterior mirror heating button |
| F321 | Parking brake switch |
| G238 | Air quality sensor |
| J329 | Terminal 15 voltage supply relay |
| J393 | Convenience system central control unit |
| J502 | Tyre pressure monitor control unit |
| J518 | Entry and start authorisation control unit |
| SB51 | Fuse 51 on fuse holder |
| SB52 | Fuse 52 on fuse holder |
| SB53 | Fuse 53 on fuse holder |
| SB54 | Fuse 54 on fuse holder |
| T16b | 16-pin connector, self-diagnosis connection in driver footwell |
| T32c | 32-pin connector |
| T81 | 81-pin connector |
| V12 | Rear window wiper motor |
| V48 | Left headlight range control motor |
| V49 | Right headlight range control motor |
| B165 | Positive connection 2 (15), in interior wiring harness |
| B273 | Positive connection (15), in main wiring harness |
| B277 | Positive connection 1 (15a), in main wiring harness |
| B284 | Positive connection 8 (15a), in main wiring harness |
| B285 | Positive connection 9 (15a), in main wiring harness |
| E281 | Operating unit for self-levelling suspension |
| F4 | Reversing light switch |
| J104 | ABS with EDL control unit |
| J345 | Trailer detection control unit |
| J530 | Garage door opener control unit |
| J646 | Transfer gearbox control unit |
| SC38 | Fuse 38 on fuse holder |
| SC40 | Fuse 40 on fuse holder |
| SC41 | Fuse 41 on fuse holder |
| SC42 | Fuse 42 on fuse holder |
| SC43 | Fuse 43 on fuse holder |
| SC44 | Fuse 44 on fuse holder |
| T5h | 5-pin connector |
| T47a | 47-pin connector |
| T47b | 47-pin connector |
| Z20 | Left washer jet heater element |
| Z21 | Right washer jet heater element |
| B165 | Positive connection 2 (15), in interior wiring harness |
| B282 | Positive connection 6 (15a), in main wiring harness |
| B287 | Positive connection 11 (15a), in main wiring harness |
| B288 | Positive connection 12 (15a), in main wiring harness |
| C14 | Positive connection (15), in heated washer jet wiring harness |
| * | Applies only to models with a manual gearbox |
| ** | Only models with a garage door opener |
| F125 | Multi-function switch * |
| F189 | Tiptronic switch * |
| J197 | Self-levelling suspension control unit |
| J217 | Automatic gearbox control unit |
| J526 | Telephone and Telematics control unit |
| SC48 | Fuse 48 on fuse holder |
| SC49 | Fuse 49 on fuse holder |
| SC51 | Fuse 51on fuse holder * |
| SC52 | Fuse 52 on fuse holder * |
| T18a | 18-pin connector |
| T52 | 52-pin connector |
| T121 | 121-pin connector |
| Y7 | Automatic anti-dazzle interior mirror |
| B165 | Positive connection 2 (15), in interior wiring harness |
| B290 | Positive connection 14 (15a), in main wiring harness |
| B291 | Positive connection 15 (15a), in main wiring harness |
| * | Applies only to models with an automatic gearbox |
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