| J9 | Heated rear window relay |
| J104 | ABS control unit |
| J345 | Trailer detector control unit |
| J389 | Rear right door control unit |
| J393 | Convenience system central control unit |
| J446 | Parking aid control unit |
| J519 | Onboard supply control unit |
| J526 | Telephone and telematics control unit |
| J646 | Transfer box control unit |
| SC1 | Fuse 1 on fuse holder C |
| SC2 | Fuse 2 on fuse holder C |
| SC3 | Fuse 3 on fuse holder C |
| SC4 | Fuse 4 on fuse holder C |
| SC5 | Fuse 5 on fuse holder C |
| SC6 | Fuse 6 on fuse holder C |
| SC7 | Fuse 7 on fuse holder C |
| SC14 | Fuse 14 on fuse holder C |
| SC15 | Fuse 15 on fuse holder C |
| SC16 | Fuse 16 on fuse holder C |
| SC17 | Fuse 17 on fuse holder C |
| SC18 | Fuse 18 on fuse holder C |
| T4ac | 4-pin connector, coupling point, right B-pillar |
| T6d | 6-connector, on onboard supply control unit |
| T12c | 12-pin connector, on rear lid control unit |
| T12h | 12-pin connector |
| T16m | 16-pin connector, on parking aid control unit |
| T18a | 18-pin connector, on telephone/telematics control unit |
| T47a | 47-pin connector, on transfer box control unit |
| T47b | 47-pin connector, on ABS control unit |
| W3 | Luggage compartment light |
| B301 | Positive connection 5 (30), in main wiring harness |
| W20 | Positive connection (30a) in rear wiring harness |
| E265 | Rear Climatronic operating and display unit |
| J197 | Adaptive suspension control unit |
| J217 | Automatic gearbox control unit |
| J255 | Climatronic control unit |
| J301 | Air conditioning system control unit |
| J521 | Front passenger seat adjustment with memory control unit |
| 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 |
| SC27 | Fuse 27 on fuse holder |
| SC29 | Fuse 29 on fuse holder |
| SC30 | Fuse 30 on fuse holder |
| T10i | 10-pin connector, green, front right footwell |
| T10n | 10-pin connector, black, front right seat |
| T12cb | 12-pin connector, on Climatronic control unit |
| T16cb | 16-pin connector, on Climatronic operating and display unit |
| T17 | 17-pin connector, black, front right footwell |
| B301 | Positive connection 5 (30), in main wiring harness |
| B324 | Positive connection 10 (30a), 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 |
| * | Only models with automatic gearbox |
| ** | Only models with Climatronic |
| *** | Only models with manual air conditioning system |
| J104 | ABS control unit |
| J387 | Front passenger door control unit |
| J389 | Rear right door control unit |
| J393 | Convenience system central control unit |
| J519 | Onboard supply control unit |
| J646 | Transfer box control unit |
| R | Radio |
| R12 | Amplifier |
| R78 | TV tuner |
| SC10 | Fuse 10 on fuse holder C |
| SC11 | Fuse 11 on fuse holder C |
| SC12 | Fuse 12 on fuse holder C |
| SC31 | Fuse 31 on fuse holder C |
| SC32 | Fuse 32 on fuse holder C |
| SC34 | Fuse 34 on fuse holder C |
| SC35 | Fuse 35 on fuse holder C |
| SC56 | Fuse 56 on fuse holder C |
| SC57 | Fuse 57 on fuse holder C |
| T4at | 4-pin connector, coupling point, right A-pillar |
| T5e | 5-pin connector, coupling point, right A-pillar |
| T5i | 5-pin connector, coupling point, right B-pillar |
| T6d | 6-connector, on onboard supply control unit |
| T23 | 23-pin connector, on rear lid control unit |
| T47a | 47-pin connector, on transfer box control unit |
| T47b | 47-pin connector, on ABS control unit |
| B301 | Positive connection 5 (30), in main wiring harness |
| B331 | Connection 17 (30a), in main wiring harness |
| B334 | Connection 20 (30a), in main wiring harness |
| V39 | Positive connection 2 (30), in radio amplifier wiring harness |
| A | Battery |
| B | Starter |
| C | Alternator |
| E74 | Battery master/isolator switch |
| J234 | Airbag control unit |
| J403 | Adaptive suspension compressor relay |
| J519 | Onboard supply control unit |
| J655 | Battery cut-off relay |
| SD1 | Fuse 1 on fuse holder D |
| SD2 | Fuse 2 on fuse holder D |
| SD3 | Fuse 3 on fuse holder D |
| SD4 | Fuse 4 on fuse holder D |
| SD5 | Fuse 5 on fuse holder D |
| SD7 | Fuse 7 on fuse holder D |
| SD9 | Fuse 9 on fuse holder D |
| SD11 | Fuse 11 on fuse holder D |
| SD13 | Fuse 13 on fuse holder D |
| T4r | 4-pin connector, on battery master/isolator switch |
| T16p | 16-pin connector |
| T26a | 26-pin connector |
| TV2 | Terminal 30 wiring junction |
| TV3 | Terminal 30a 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 models with engine code AYH |
| --- | Only models with engine code AYH |
| A1 | Second battery |
| J162 | Heater control unit |
| J518 | Entry and start authorisation control unit |
| J519 | Onboard supply control unit |
| J708 | Residual heat relay |
| J713 | Second battery charging circuit relay |
| 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 |
| SB6 | Fuse 6 on fuse holder |
| SD8 | Fuse 8 on fuse holder |
| S65 | 2nd battery fuse |
| T18 | 18-pin connector, on onboard supply control unit |
| T81 | 81-pin connector, on entry and start authorisation control unit |
| TV29 | Terminal 30 wiring junction 4 |
| U1 | Cigarette lighter |
| U18 | 12 V socket 2, front of centre console |
| U19 | 12 V socket 3 |
| U20 | 12 V socket 4, rear of centre console |
| 49 | Earth point, near second battery |
| 382 | Earth connection 17, in main wiring harness |
| 632 | Earth point, rear left door |
| B326 | Positive connection 12 (30a), in main wiring harness |
| B327 | Positive connection 13 (30a), in main wiring harness |
| B329 | Positive connection 15 (30a), in main wiring harness |
| --- | - Only models with engine code AYH |
| J39 | Headlight washer system relay |
| J386 | Driver door control unit |
| J388 | Rear left door control unit |
| J393 | Convenience system central control unit |
| J519 | Onboard supply control unit |
| SB7 | Fuse 7 on fuse holder B |
| SB8 | Fuse 8 on fuse holder B |
| SB9 | Fuse 9 on fuse holder B |
| SB10 | Fuse 10 on fuse holder B |
| SB11 | Fuse 11 on fuse holder B |
| SB12 | Fuse 12 on fuse holder B |
| SB14 | Fuse 14 on fuse holder B |
| SB15 | Fuse 15 on fuse holder B |
| SB16 | Fuse 16 on fuse holder B |
| SB17 | Fuse 17 on fuse holder B |
| SB18 | Fuse 18 on fuse holder B |
| SB19 | Fuse 19 on fuse holder B |
| T4b | 4-connector, on onboard supply control unit |
| T6a | 6-connector, on onboard supply control unit |
| T6d | 6-connector, on onboard supply control unit |
| T6g | 6-connector, on onboard supply control unit |
| T6r | 6-connector, on onboard supply control unit |
| T16b | 16-pin connector, self-diagnosis connection in driver footwell |
| T23 | 23-pin connector, on rear lid control unit |
| V | Windscreen wiper motor |
| B298 | Positive connection 2 (30), in main wiring harness |
| B321 | Connection 7 (30a), in main wiring harness |
| B322 | Connection 8 (30a), in main wiring harness |
| J136 | Seat and steering column adjustment control unit with memory |
| J245 | Sliding sunroof adjustment control unit |
| J502 | Tyre pressure monitor control unit |
| J518 | Entry and start authorisation control unit |
| J519 | Onboard supply control unit |
| J527 | Steering column electronics control unit |
| J647 | Axle differential lock 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 |
| SB42 | Fuse 42 on fuse holder |
| SB44 | Fuse 44 on fuse holder |
| SB45 | Fuse 45 on fuse holder |
| SB57 | Fuse 57 on fuse holder |
| T4y | 4-pin connector, on steering column electronics control unit |
| T6u | 6-pin connector, on entry and start authorisation control unit |
| T26a | 26-pin connector, on onboard supply control unit |
| T37c | 37-pin connector, on tyre pressure monitor control unit |
| T47c | 47-pin connector, on axle differential lock control unit |
| V306 | Rear blower Bitron regulation motor |
| B278 | Positive connection 2 (15a), in main wiring harness |
| B298 | Positive connection 2 (30), in main wiring harness |
| B323 | Positive connection 9 (30a), in main wiring harness |
| F | Brake light switch |
| J9 | Heated rear window relay |
| J32 | Air conditioning system relay |
| J285 | Control unit with display in dash panel insert |
| J518 | Entry and start authorisation control unit |
| J519 | Onboard supply control unit |
| J527 | Steering column electronics control unit |
| J712 | Heated seat relay |
| 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, on onboard supply control unit |
| T16a | 16-pin connector, on steering column electronics control unit |
| T16p | 16-pin connector, on onboard supply control unit |
| T32a | 32-pin connector, blue, on dash panel insert |
| T81 | 81-pin connector, on entry and start authorisation control unit |
| 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 |
| * | Only models with manual air conditioning system |
| --- | Only models with engine code AYH |
| E1 | Light switch |
| E102 | Headlight range control regulator |
| G238 | Air quality sensor |
| J236 | Servotronic control unit |
| J329 | Terminal 15 voltage supply relay |
| J502 | Tyre pressure monitor control unit |
| J518 | Entry and start authorisation control unit |
| J647 | Axle differential lock control unit |
| J647 | Axle differential lock control unit |
| SB47 | Fuse 47 on fuse holder B |
| SB49 | Fuse 49 on fuse holder B |
| SB50 | Fuse 50 on fuse holder B |
| SB51 | Fuse 51 on fuse holder B |
| SB52 | Fuse 52 on fuse holder B |
| SB53 | Fuse 53 on fuse holder B |
| SB54 | Fuse 54 on fuse holder B |
| T6bt | 6-pin connector, black |
| T10f | 10-pin connector, red, E-box in engine compartment |
| T16b | 16-pin connector, self-diagnosis connection in driver footwell |
| T32c | 32-pin connector |
| T47c | 47-pin connector |
| T81 | 81-pin connector |
| V12 | Rear window wiper motor |
| B165 | Positive connection 2 (15), in interior wiring harness |
| B273 | Positive connection (15), in main wiring harness |
| B277 | Connection 1 (15a), in main wiring harness |
| B284 | Connection 8 (15a), in main wiring harness |
| B285 | Connection 9 (15a), in main wiring harness |
| D52 | Positive connection (15a), in engine compartment wiring harness |
| * | Only models with engine code AZZ |
| E281 | Operating unit to regulate suspension height |
| F4 | Reversing light switch |
| J104 | ABS with EDL control unit |
| J345 | Trailer detector control unit |
| J530 | Garage door operation control unit |
| J646 | Transfer box 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 |
| T6aj | 6-pin connector, on trailer detector control unit |
| T47a | 47-pin connector, on transfer box control unit |
| T47b | 47-pin connector, on ABS with EDL control unit |
| 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 |
| * | Only models with manual gearbox |
| ** | Only models with garage door opener |
| F125 | Multifunction switch * |
| F189 | Tiptronic switch * |
| J197 | Adaptive suspension control unit |
| J217 | Automatic gearbox control unit |
| J446 | Parking aid control unit ** |
| J526 | Telephone and telematics control unit |
| SB56 | Fuse 56 on fuse holder |
| SC48 | Fuse 48 on fuse holder |
| SC49 | Fuse 49 on fuse holder |
| SC50 | Fuse 50 on fuse holder ** |
| SC51 | Fuse 51 on fuse holder * |
| SC52 | Fuse 52 on fuse holder * |
| T16m | 16-pin connector, on parking aid control unit |
| T18a | 18-pin connector, on telephone/telematics control unit |
| T52 | 52-pin connector, on automatic gearbox control unit |
| T121 | 121-pin connector, on adaptive suspension control unit |
| V305 | Front blower Bitron regulation motor |
| 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 |
| B318 | Positive connection 4 (30a), in main wiring harness |
| * | Only models with automatic gearbox |
| ** | Discontinued from May 2003 |
| J519 | Onboard supply control unit |
| J581 | Battery parallel circuit relay |
| J682 | Terminal 50 voltage supply relay |
| J701 | Voltage supply relay 1, start relevant consumers |
| J710 | Voltage supply relay 2, start relevant consumers |
| S6 | Fuse in relay plate fuse holder |
| S16 | Fuse in relay plate fuse holder |
| SD10 | Fuse 10 on fuse holder |
| T10c | 10-pin connector, pink, E-box in engine compartment |
| T16p | 16-pin connector |
| T18 | 18-pin connector |
| TV15 | Wiring connector |
| 32 | Earth point, on left behind dash panel |
| 39 | Earth point, under rear left seat |
| 201 | Earth connection 5, in engine compartment wiring harness |
| 370 | Earth connection 5, in main wiring harness |
| 385 | Earth connection 20, in main wiring harness |
| 647 | Earth point 3, bulkhead |
| B202 | Connection 3 (DCt), in interior wiring harness |
| B316 | Positive connection 2 (30a), in main wiring harness |
| D50 | Positive connection (30), in engine compartment wiring harness |
| D97 | Connection (50), in engine compartment right wiring harness |
| D144 | Positive connection 5 (30), in engine compartment wiring harness |
| --- | Only models with engine code AYH |
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