| E221 | Operating unit in steering wheel |
| F138 | Coil in steering wheel |
| H | Horn activation |
| J234 | Airbag control unit, on the front of the tunnel |
| J453 | Multi-function steering wheel control unit |
| N95 | Airbag igniter, driver side |
| T3z | 3-pin connector, on left A-pillar (yellow) |
| T5a | 5-pin connector, at steering wheel |
| T5b | 5-pin connector, in the steering wheel |
| T75a | 75-pin connector, at airbag control unit |
| 81 | Earth connection -1-, in dash panel wiring harness |
| J453 | Multi-function steering wheel control unit |
| K | Dash panel insert |
| T16a | 16-pin connector, under the glove compartment on the driver's side (diagnostic connection) |
| T32b | 32-pin connector, at dash panel insert (green) |
| 135 | Earth connection -2-, in dash panel wiring harness |
| A52 | Positive connection -2- (30), in dash panel wiring harness |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| A146 | Connection (CAN H, convenience), in dash panel wiring harness |
| A147 | Connection (CAN L, convenience), in dash panel wiring harness |
| A167 | Positive connection -3- (30a), in dash panel wiring harness |
| E45 | Cruise control system switch |
| J... | Engine control units |
| J453 | Multi-function steering wheel control unit |
| T10n | 10-pin connector, at CCS switch |
| T15a | 15-pin connector, in plenum chamber (white) |
| A38 | Positive connection -2- (15a), in dash panel wiring harness |
| A130 | Connection (cruise control), in dash panel wiring harness |
| A192 | Positive connection -3- (15a), in dash panel wiring harness |
| A193 | Connection (87a), in dash panel wiring harness |
| *1 | only for engine identification characters AWT |
| *2 | only for engine identification characters AZM, BBG, AMX |
| *3 | only for diesel engines |
| *4 | see current flow diagram engine / CCS |
| H2 | High tone horn |
| H7 | Low tone horn |
| J4 | Horn relay |
| J59 | X contact relief relay |
| J453 | Multi-function steering wheel control unit |
| SB40 | Fuse, in fuse holder |
| T2g | 2-pin connector, at high tone horn |
| T2h | 2-pin connector, at low tone horn |
| T6b | 6-pin connector, on right A-pillar (red) |
| T10b | 10-pin connector, on left A-pillar (red) |
| 176 | Earth connection, in right headlight wiring harness |
| 179 | Earth connection, in left headlight wiring harness |
| A90 | Connection (horn), in dash panel wiring harness |
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