| D | Ignition/starter switch |
| F319 | Selector lever locked in position P switch |
| J519 | Onboard supply control unit |
| J527 | Steering column electronics control unit |
| N376 | Ignition key withdrawal lock solenoid, on ignition/starter switch |
| SC | Fuse holder C |
| SC24 | Fuse 24 on fuse holder C |
| SC25 | Fuse 25 on fuse holder C |
| T6l | 6-pin connector |
| T10s | 10-pin connector, under selector lever |
| T12j | 12-pin connector |
| T16f | 16-pin connector |
| T20d | 20-pin connector |
| T52b | 52-pin connector |
| T52c | 52-pin connector |
| B170 | Positive connection 2 (30), in interior wiring harness |
| B276 | Positive connection (50), in main wiring harness |
| B290 | Positive connection 14 (15a) in main wiring harness |
| E26 | Connection (selector position P/N), in Motronic wiring harness |
| * | Up to July 2010 |
| *2 | Only models with automatic gearbox |
| *3 | From August 2010 |
| *4 | Only applicable to special vehicles |
| *5 | Only models with stop/start system |
| E2 | Turn signal switch |
| E4 | Headlight dipper and flasher switch |
| E22 | Intermittent wiper switch |
| E34 | Rear wiper switch |
| E38 | Intermittent wiper regulator |
| E44 | Washer pump switch (automatic wash/wipe and headlight washer system) |
| E45 | Cruise control system switch |
| E86 | Multifunction display call-up button |
| E109 | Multifunction display memory switch |
| E227 | Cruise control system (CCS) SET button |
| J519 | Onboard supply control unit |
| J527 | Steering column electronics control unit |
| J623 | Engine control unit |
| T8y | 8-pin connector |
| T10y | 10-pin connector |
| T16f | 16-pin connector |
| B441 | Connection (CCS), in main wiring harness |
| * | Only models with multifunction display |
| *2 | Only models with cruise control system |
| *3 | From August 2010 |
| *4 | Up to July 2010 |
| J519 | Onboard supply control unit |
| L22 | Left fog light bulb |
| M1 | Left side light bulb |
| M5 | Front left turn signal bulb |
| M29 | Left headlight dipped beam bulb |
| M30 | Left headlight main beam bulb |
| T2bc | 2-pin connector |
| T10i | 10-pin connector, on left headlight |
| T52a | 52-pin connector |
| T52c | 52-pin connector |
| 119 | Earth connection 1, in headlight wiring harness |
| 376 | Earth connection 11, in main wiring harness |
| 392 | Earth connection 27, in main wiring harness |
| 655 | Earth point, on left headlight |
| B144 | Positive connection (58L), in interior wiring harness |
| B581 | Positive connection (left indicator lamp), in interior wiring harness |
| C69 | Front left connection (fog light),, in main wiring harness |
| E20 | Switch and instrument illumination regulator |
| E102 | Headlight range control regulator |
| J519 | Onboard supply control unit |
| L105 | Illumination regulator illumination bulb |
| T8e | 8-pin connector |
| T10i | 10-pin connector, on left headlight |
| T52b | 52-pin connector |
| T52c | 52-pin connector |
| V48 | Left headlight range control motor |
| 119 | Earth connection 1, in headlight wiring harness |
| 376 | Earth connection 11, in main wiring harness |
| B457 | Connection 1 (potentiometer), in main wiring harness |
| * | Only models with headlight range control |
| *2 | From February 2012 |
| F266 | Bonnet contact switch |
| H2 | Treble horn |
| H7 | Bass horn |
| J4 | Dual tone horn relay |
| J519 | Onboard supply control unit |
| T10j | 10-pin connector, on right headlight |
| T52a | 52-pin connector |
| T52b | 52-pin connector |
| V49 | Right headlight range control motor |
| 376 | Earth connection 11, in main wiring harness |
| 378 | Earth connection 13, in main wiring harness |
| A90 | Connection (dual tone horn), in dash panel wiring harness |
| B457 | Connection 1 (potentiometer), in main wiring harness |
| B521 | Connection (dual tone horn), in main wiring harness |
| * | Only models with headlight range control |
| *2 | According to equipment |
| *3 | From January 2010 |
| *4 | Up to January 2010 |
| *5 | From February 2012 |
| J519 | Onboard supply control unit |
| L23 | Right fog light bulb |
| M3 | Right side light bulb |
| M7 | Front right turn signal bulb |
| M31 | Right headlight dipped beam bulb |
| M32 | Right headlight main beam bulb |
| T2bd | 2-pin connector |
| T10j | 10-pin connector, on right headlight |
| T52a | 52-pin connector |
| T52c | 52-pin connector |
| 120 | Earth connection 2, in headlight wiring harness |
| 378 | Earth connection 13, in main wiring harness |
| 393 | Earth connection 28, in main wiring harness |
| 656 | Earth point, on right headlight |
| B143 | Positive connection (58R), in interior wiring harness |
| B582 | Positive connection (right indicator lamp), interior wiring harness |
| B643 | Connection 2 (56a), in main wiring harness |
| B662 | Connection 2 (56b), in main wiring harness |
| D59 | Connection (fog light), in engine compartment wiring harness |
| J519 | Onboard supply control unit |
| L46 | Rear left fog light bulb |
| M2 | Right tail light bulb |
| M4 | Left tail light bulb |
| M6 | Rear left turn signal bulb |
| M17 | Right reversing light bulb |
| M21 | Left brake and tail light bulb |
| T3au | 3-pin connector |
| T3aw | 3-pin connector |
| T3ax | 3-pin connector |
| T5a | 5-pin connector, in rear left side panel |
| T5c | 5-pin connector, in rear left side panel |
| T5e | 5-pin connector, in rear left side panel |
| T52a | 52-pin connector |
| T52c | 52-pin connector |
| 98 | Earth connection, in rear lid wiring harness |
| 369 | Earth connection 4, in main wiring harness |
| 662 | Earth point, rear left side panel |
| A87 | Connection (RL), in dash panel wiring harness |
| J519 | Onboard supply control unit |
| M8 | Rear right turn signal bulb |
| M22 | Right brake and tail light bulb |
| M25 | Additional brake light bulb |
| T2aj | 2-pin connector, under rear bumper on right |
| T3av | 3-pin connector |
| T5a | 5-pin connector, in rear left side panel |
| T8l | 8-pin connector |
| T52a | 52-pin connector |
| T52c | 52-pin connector |
| X | Number plate light |
| 86 | Earth connection 1, in rear wiring harness |
| 98 | Earth connection, in rear lid wiring harness |
| 345 | Earth connection, in bumper wiring harness |
| 682 | Earth point 2, in rear right side panel |
| W41 | Positive connection (58), in number plate lights wiring harness |
| X149 | Connection (5V), rear bumper wiring harness |
| * | Only models with rear parking aid |
| *2 | From February 2012 |
| F256 | Rear lid lock unit |
| J386 | Driver door control unit |
| J387 | Front passenger door control unit |
| J519 | Onboard supply control unit |
| L131 | Driver side turn signal repeater bulb |
| L132 | Front passenger side turn signal repeater bulb |
| T4ab | 4-pin connector |
| T5c | 5-pin connector, in rear left side panel |
| T16a | 16-pin connector |
| T16g | 16-pin connector |
| T20a | 20-pin connector |
| T20b | 20-pin connector |
| T28 | 28-pin connector, in left A-pillar coupling station |
| T28a | 28-pin connector, in right A-pillar coupling station |
| T52a | 52-pin connector |
| W3 | Luggage compartment light |
| 195 | Earth connection, in rear door switch wiring harness |
| 205 | Earth connection, in driver door wiring harness |
| 206 | Earth connection, in front passenger door wiring harness |
| * | From August 2011 |
| E229 | Hazard warning lights button |
| F4 | Reversing light switch |
| J9 | Heated rear window relay |
| J519 | Onboard supply control unit |
| K6 | Indicator lamp for hazard warning light |
| T5a | 5-pin connector |
| T6 | 6-pin connector |
| T52a | 52-pin connector |
| T52b | 52-pin connector |
| T52c | 52-pin connector |
| 47 | Earth point, in front right footwell |
| 366 | Earth connection 1, in main wiring harness |
| 387 | Earth connection 22, in main wiring harness |
| 388 | Earth connection 23, in main wiring harness |
| * | According to equipment |
| *2 | Only models with manual gearbox |
| *3 | Up to January 2010 |
| *4 | From January 2010 |
| G397 | Rain and light sensor |
| J400 | Wiper motor control unit |
| J519 | Onboard supply control unit |
| T3ae | 3-pin connector |
| T4q | 4-pin connector |
| T4u | 4-pin connector |
| T5e | 5-pin connector, in rear left side panel |
| T52a | 52-pin connector |
| T52b | 52-pin connector |
| V | Windscreen wiper motor |
| V12 | Rear window wiper motor |
| V59 | Windscreen and rear window washer pump |
| 387 | Earth connection 22, in main wiring harness |
| B183 | Connection 1 (washer pump), in interior wiring harness |
| B184 | Connection 2 (washer pump), in interior wiring harness |
| B528 | Connection 1 (LIN bus) in main wiring harness |
| * | According to equipment |
| *2 | Only models with rain sensor |
| E26 | Glove compartment light switch |
| J519 | Onboard supply control unit |
| T52b | 52-pin connector |
| T52c | 52-pin connector |
| W6 | Glove compartment light |
| 44 | Earth point, lower part of left A-pillar |
| 367 | Earth connection 2, in main wiring harness |
| 387 | Earth connection 22, in main wiring harness |
| 389 | Earth connection 24, in main wiring harness |
| 605 | Earth point, on top end of steering column |
| B559 | Positive connection 1 (30g) in main wiring harness |
| J519 | Onboard supply control unit |
| L65 | Sliding sunroof switch illumination bulb |
| L156 | Switch illumination bulb |
| T2t | 2-pin connector |
| T6a | 6-pin connector |
| T6b | 6-pin connector |
| T8d | 8-pin connector, near front interior light |
| T52c | 52-pin connector |
| W1 | Front interior light |
| W13 | Front passenger reading light |
| W19 | Driver side reading light |
| Y7 | Automatic anti-dazzle interior mirror |
| 347 | Earth connection, in roof wiring harness |
| 380 | Earth connection 15, in main wiring harness |
| 389 | Earth connection 24, in main wiring harness |
| B154 | Connection 1 (DCt), in interior wiring harness |
| B250 | Positive connection, in roof wiring harness |
| B559 | Positive connection 1 (30g) in main wiring harness |
| B603 | Positive connection 2 (30g) in main wiring harness |
| * | Only models with sliding/tilting sunroof |
| *2 | Only models with automatic anti-dazzle interior mirror |
| *3 | Flat conductor |
| *4 | Only models with rain sensor |
| *5 | Only models with warning function for brake pad wear |
| F147 | Driver vanity mirror contact switch |
| F148 | Front passenger vanity mirror contact switch |
| J29 | Blocking diode |
| J519 | Onboard supply control unit |
| L28 | Cigarette lighter illumination bulb |
| T5y | 5-pin connector |
| U1 | Cigarette lighter |
| W11 | Rear left reading light |
| W12 | Rear right reading light |
| W14 | Front passenger side illuminated vanity mirror |
| W20 | Driver side illuminated vanity mirror |
| W43 | Rear interior light |
| 47 | Earth point, in front right footwell |
| 347 | Earth connection, in roof wiring harness |
| 390 | Earth connection 25, in main wiring harness |
| B250 | Positive connection, in roof wiring harness |
| B348 | Connection 1 (75a), in main wiring harness |
| * | Flat conductor |
| J519 | Onboard supply control unit |
| J533 | Data bus diagnostic interface, in left footwell, near centre console |
| J623 | Engine control unit |
| T16 | 16-pin connector, on left under dash panel |
| T20 | 20-pin connector |
| T52c | 52-pin connector |
| U31 | Diagnostic connection |
| A76 | Connection (K-diagnosis wire), in dash panel wiring harness |
| B383 | Connection 1 (powertrain CAN bus, high), in main wiring harness |
| B390 | Connection 1 (powertrain CAN bus, low), in main wiring harness |
| B397 | Connection 1 (convenience CAN bus, high), in main wiring harness |
| B398 | Connection 2 (convenience CAN bus, high), in main wiring harness |
| B406 | Connection 1 (convenience CAN bus, low), in main wiring harness |
| B407 | Connection 2 (convenience CAN bus, low), in main wiring harness |
| H3 | Buzzer and gong |
| J285 | Control unit in dash panel insert |
| J533 | Data bus diagnostic interface, in left footwell, near centre console |
| K31 | Cruise control system warning lamp |
| K166 | Door open warning lamp |
| K170 | Bulb failure warning lamp |
| T20 | 20-pin connector |
| T32 | 32-pin connector |
| A178 | Connection (infotainment CAN bus, high), in dash panel wiring harness |
| A179 | Connection (infotainment CAN bus, low), in dash panel wiring harness |
| A225 | Connection 2 (infotainment CAN bus, high) in dash panel wiring harness |
| A226 | Connection 2 (infotainment CAN bus, low) in dash panel wiring harness |
| D2 | Immobiliser reader coil |
| F1 | Oil pressure switch |
| F9 | Handbrake warning switch |
| F34 | Brake fluid level warning contact |
| G34 | Front left brake pad wear sender |
| J285 | Control unit in dash panel insert |
| J362 | Immobiliser control unit |
| K2 | Alternator warning lamp |
| K3 | Oil pressure warning lamp |
| K14 | Handbrake warning lamp |
| K32 | Brake pad warning lamp |
| K65 | Left turn signal warning lamp |
| K94 | Right turn signal warning lamp |
| K116 | Rear lid open warning lamp |
| K118 | Brake system warning lamp |
| T14a | 14-pin connector, near battery |
| T32 | 32-pin connector |
| 381 | Earth connection 16, in main wiring harness |
| B379 | Connection 1 (brake pad wear indicator), in main wiring harness |
| B380 | Connection 2 (brake pad wear indicator), in main wiring harness |
| G | Fuel gauge sender |
| G1 | Fuel gauge |
| G3 | Coolant temperature gauge |
| G17 | Ambient temperature sensor |
| G32 | Coolant shortage indicator sender |
| G33 | Windscreen washer fluid level sender |
| J119 | Multifunction indicator |
| J285 | Control unit in dash panel insert |
| J538 | Fuel pump control unit |
| K28 | Coolant temperature and coolant shortage warning lamp |
| K37 | Washer fluid level warning lamp |
| K105 | Reserve fuel warning lamp |
| T2z | 2-pin connector |
| T5b | 5-pin connector |
| T10n | 10-pin connector |
| T32 | 32-pin connector |
| 410 | Earth connection 1 (sender earth) in main wiring harness |
| * | see applicable current flow diagram for engine |
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