| J412 | Operating electronics control unit/telephone (interface box) |
| J503 | Navigation system control unit |
| S258 | Navigation fuse |
| SB45 | Fuse, in fuse holder |
| T8d | 8-pin connector, at the navigation system control unit (black) |
| T18d | 18-pin connector, at operating electronics control unit/telephone (interface box) |
| T20a | 20-pin connector, at navigation system control unit |
| 255 | Earth connection -1-, in wiring harness behind dash panel |
| 606 | Earth point, under the centre console, near gear stick |
| A11 | Positive connection (58b), in wiring harness behind dash panel |
| A21 | Positive connection (86s), in wiring harness behind dash panel |
| A27 | Connection (speed signal), in wiring harness behind dash panel |
| A46 | Positive connection (30 radio), in wiring harness behind dash panel |
| A76 | Connection (diagnosis wire K), in wiring harness behind dash panel, left |
| only for vehicles with CD changer |
| only for vehicles with telephone preinstallation 2 Cullmann |
| J503 | Navigation system control unit |
| R20 | Treble loudspeaker, front left |
| R21 | Bass loudspeaker, front left |
| R22 | Treble loudspeaker, front right |
| R23 | Bass loudspeaker, front right |
| T2m | 2-pin connector, at treble loudspeaker, front left |
| T2n | 2-pin connector, at treble loudspeaker, front right |
| T4m | 4-pin connector, on left A-pillar (black) |
| T4n | 4-pin connector, on right A-pillar (black) |
| T4u | 4-pin connector, at bass loudspeaker, front left |
| T4v | 4-pin connector, at bass loudspeaker, front right |
| T8n | 8-pin connector, at the navigation system control unit (brown) |
| J503 | Navigation system control unit |
| R14 | Treble loudspeaker, rear left |
| R15 | Bass loudspeaker, rear left |
| R16 | Treble loudspeaker, rear right |
| R17 | Bass loudspeaker, rear right |
| T2o | 2-pin connector, at treble loudspeaker, rear left |
| T2p | 2-pin connector, at treble loudspeaker, rear right |
| T2r | 2-pin connector, at bass loudspeaker, rear left |
| T2s | 2-pin connector, at bass loudspeaker, rear left |
| T2t | 2-pin connector, at bass loudspeaker, rear right |
| T2u | 2-pin connector, at bass loudspeaker, rear right |
| T4o | 4-pin connector, on left B-pillar (black) |
| T4p | 4-pin connector, on right B-pillar (black) |
| T8n | 8-pin connector, at the navigation system control unit (brown) |
| * | only for vehicles with 8 loudspeakers |
| F4 | Reversing light switch |
| J104 | ABS control unit/ ABS with TCS/ABS with EDL and TCS/ESP |
| J503 | Navigation system control unit |
| M16 | Reversing light bulb, left |
| M17 | Reversing light bulb, right |
| SB12 | Fuse, in fuse holder |
| T11a | 11-pin connector, at front wall, left (white) |
| T26a | 26-pin connector, at navigation system control unit |
| T38a | 38-pin connector, at ABS control unit/ABS with TCS/ABS with EDL and TCS/ESP |
| A70 | Positive connection (15a), in wiring harness behind dash panel |
| B182 | Connection (reversing lights), in interior wiring harness |
| * | not valid for vehicles with automatic gearbox |
| J503 | Navigation system control unit |
| J559 | Traffic information control unit, behind dash panel |
| K | Dash panel insert |
| T12m | 12-pin connector, at traffic information control unit |
| T26a | 26-pin connector, at navigation system control unit |
| T32a | 32-pin connector, at dash panel insert |
| A146 | Connection (CAN H, convenience), in wiring harness behind dash panel |
| A147 | Connection (CAN L, convenience), in wiring harness behind dash panel |
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