| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| J226 | Starter inhibitor and reversing light relay |
| SA1 | Fuse -1- on battery fuse box |
| SA5 | Fuse -5- on battery fuse box |
| T1 | Single connector, behind relay plate |
| T1g | Single connector, behind relay plate |
| T2j | 2-pin connector, behind relay plate |
| 1 | Earth strap, battery - body |
| 2 | Earth strap, gearbox - body |
| C10 | Positive (+) connection -1- (30), in headlight wiring harness |
| A | Battery |
| J220 | Motronic control unit, in engine compartment, left |
| N70 | Ignition coil 1 with output stage |
| N127 | Ignition coil 2 with output stage |
| N291 | Ignition coil 3 with output stage |
| P | Spark plug connector |
| Q | Spark plugs |
| S102 | Engine control unit fuse |
| T4a | 4-pin connector |
| T4b | 4-pin connector |
| T4c | 4-pin connector |
| T121 | 121-pin connector |
| 85 | Earth connection -1-, in engine compartment wiring harness |
| 281 | Earth connection -1-, in engine prewiring wiring harness |
| D52 | Positive (+) connection (15a), in engine compartment wiring harness |
| E31 | Connection (15), in engine wiring harness |
| A | Battery |
| J220 | Motronic control unit, in engine compartment, left |
| N292 | Ignition coil 4 with output stage |
| N323 | Ignition coil -5- with output stage |
| N324 | Ignition coil -6- with output stage |
| P | Spark plug connector |
| Q | Spark plugs |
| T4d | 4-pin connector |
| T4e | 4-pin connector |
| T4f | 4-pin connector |
| T121 | 121-pin connector |
| 18 | Earth point, on cylinder block left |
| 85 | Earth connection -1-, in engine compartment wiring harness |
| 132 | Earth connection -3-, in engine compartment wiring harness |
| 281 | Earth connection -1-, in engine prewiring wiring harness |
| D52 | Positive (+) connection (15a), in engine compartment wiring harness |
| G2 | Coolant temperature sender |
| G40 | Hall sender |
| G61 | Knock sensor I |
| G62 | Coolant temperature sender |
| G66 | Knock sensor II |
| J220 | Motronic control unit, in engine compartment, left |
| T3a | 3-pin connector, on engine front |
| T3b | 3-pin connector, on engine right |
| T121 | 121-pin connector |
| 139 | Earth connection (sender earth), in Motronic wiring harness |
| 220 | Earth connection (sender earth), in engine wiring harness |
| D101 | Connection -1-, in engine wiring harness |
| G28 | Engine speed sender |
| G163 | Hall sender 2 |
| G186 | Throttle valve drive (electric throttle operation) |
| G187 | Throttle valve drive angle sender -1- (electric throttle operation) |
| G188 | Throttle valve drive angle sender -2- (electric throttle operation) |
| J220 | Motronic control unit, in engine compartment, left |
| J338 | Throttle valve control unit |
| T3 | 3-pin connector, on engine front |
| T6a | 6-pin connector |
| T121 | 121-pin connector |
| TV13 | Terminal for speed signal, blue |
| 220 | Earth connection (sender earth), in engine wiring harness |
| D101 | Connection -1-, in engine wiring harness |
| J104 | ABS with ESP control unit, in engine compartment, left |
| J220 | Motronic control unit, in engine compartment, left |
| M22 | Brake and tail light bulb, right |
| N30 | Injector, cylinder 1 |
| N31 | Injector, cylinder 2 |
| N32 | Injector, cylinder 3 |
| N33 | Injector, cylinder 4 |
| N83 | Injector, cylinder 5 |
| N84 | Injector, cylinder 6 |
| T2v | 2-pin connector, behind relay plate |
| T10a | 10-pin connector, in engine compartment, left |
| T88 | 88-pin connector |
| TV11 | Terminal 54 junction box, orange |
| T121 | 121-pin connector |
| D73 | Positive (+) connection (54), in engine compartment wiring harness |
| E29 | Connection, in engine wiring harness |
| G3 | Positive (+) connection in cable sleeve - injectors |
| * | Only models with ESP |
| F4 | Reversing light switch |
| G187 | Throttle valve drive angle sender -1- (electric throttle operation) |
| G188 | Throttle valve drive angle sender -2- (electric throttle operation) |
| S14 | Fuse -14- on fuse box |
| J220 | Motronic control unit, in engine compartment, left |
| J217 | Automatic gearbox Gearbox, on lower part of left A-pillar |
| J362 | Immobilizer control unit |
| T1c | Single connector, behind relay plate |
| T1o | Single connector, behind relay plate |
| T1l | Single connector, behind relay plate |
| T2n | 2-pin connector |
| T2o | 2-pin connector |
| T2p | 2-pin connector |
| T2q | 2-pin connector |
| T2r | 2-pin connector |
| T2s | 2-pin connector |
| T6c | 6-pin connector |
| T8d | 8-pin connector, behind relay plate |
| T10 | 10-pin connector |
| T12 | 12-pin connector, behind relay plate |
| T68a | 68-pin connector |
| T121 | 121-pin connector |
| TV16 | Terminal for data bus, No. 5 on relay location on relay plate |
| ** | Connection for air conditioner |
| E45 | Cruise control system switch |
| E227 | Cruise control system (CCS) button (Set) |
| F | Brake light switch |
| F47 | Cruise control system brake pedal switch |
| J17 | Fuel pump relay |
| J220 | Motronic control unit, in engine compartment, left |
| T2v | 2-pin connector, behind relay plate |
| T4f | 4-pin connector, behind relay plate |
| T4h | 4-pin connector, behind steering column switch trim |
| T12 | 12-pin connector, behind relay plate |
| T121 | 121-pin connector |
| TV2 | Terminal 30 junction box, red |
| TV5 | Terminal 15a junction box, green |
| A32 | Positive (+) connection (30), in dash panel wiring harness |
| D52 | Positive (+) connection (15a), in engine compartment wiring harness |
| Z40 | Positive (+) connection (15), in cruise control system wiring harness |
| * | Only models with ESP |
| F266 | Bonnet contact switch |
| G22 | Speedometer sender (Hall sender, on gearbox) |
| G266 | Oil level/oil temperature sender |
| J220 | Motronic control unit, in engine compartment, left |
| N79 | Heater element (crankcase breather) |
| N205 | Inlet camshaft timing adjustment valve -1- |
| N208 | Inlet camshaft timing adjustment valve -2- |
| T2x | 2-pin connector, behind relay plate |
| T3f | 3-pin connector |
| T3x | 3-pin connector, behind relay plate |
| T121 | 121-pin connector |
| D136 | Positive (+) connection -2- (15a), in engine compartment wiring harness |
| F18 | Radiator fan thermo-switch |
| F95 | Thermo-switch for continued coolant circulation |
| G | Fuel gauge sender |
| G23 | Fuel pump |
| G32 | Coolant shortage indicator sender |
| J151 | Continued circulation of coolant relay, above the relay plate |
| T1p | 1-pin connector, behind relay plate |
| T1q | 1-pin connector, behind relay plate |
| V51 | Continued coolant circulation pump |
| 18 | Earth point, on cylinder block left |
| 131 | Earth connection -2-, in engine compartment wiring harness |
| D136 | Positive (+) connection -2- (15a), in engine compartment wiring harness |
| * | Only models with air conditioner |
| -••- | Only models with Climatronic |
| G5 | Rev. counter |
| G21 | Speedometer |
| J285 | Control unit with display in dash panel insert |
| J533 | Data bus diagnostic interface, in dash panel insert |
| K31 | Cruise control system warning lamp |
| K83 | Exhaust emissions warning lamp |
| K132 | Electronic power control fault lamp |
| T16 | 16-pin connector, behind steering column, self-diagnosis connection, |
| T32 | 32-pin connector, blue |
| T32a | 32-pin connector, green |
| TV14 | Terminal for self-diagnosis, white |
| Y4 | Odometer display |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
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