| G18 | Temperature sensor |
| G64 | Flame monitor |
| J364 | Additional heater control unit |
| R1 | Aerial connection |
| R11 | Aerial |
| R64 | Auxiliary heating radio controlled receiver |
| S24 | Heater overheating fuse (8 Amp.) |
| S62 | Auxiliary heater fuse |
| T10k | 10-pin connector, white, connector point, A pillar, left |
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| 86 | Earth connection -1-, in rear wiring harness |
| 146 | Earth connection -1-, in auxiliary heater wiring harness |
| 249 | Earth connection -2-, in interior wiring harness |
| 501 | Screw connection -2- (30), on relay plate |
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| A52 | Positive (+) connection -2- (30), in dash panel wiring harness |
| * | Only models with auxiliary heating radio controlled receiver |
| E87 | Air conditioning system/Climatronic operating and display unit |
| J285 | Control unit with display in dash panel insert |
| J364 | Additional heater control unit |
| N279 | Heater coolant shut-off valve |
| Q8 | Glow plug with flame monitor |
| T2v | 2-pin connector, green, near back panel |
| T10k | 10-pin connector, white, connector point, A pillar, left |
| T16 | 16-pin connector, black, diagnostic connector |
| T32 | 32-pin connector, blue, on dash panel insert |
| V6 | Combustion air blower |
| V54 | Metering pump |
| V55 | Circulation pump |
| 146 | Earth connection -1-, in auxiliary heater wiring harness |
| 249 | Earth connection -2-, in interior wiring harness |
| A146 | Connection (convenience CAN bus, high), in dash panel wiring harness |
| A147 | Connection (convenience CAN bus, low), in dash panel wiring harness |
| A159 | Connection (L), in dash panel wiring harness |