| A | Battery |
| J234 | Airbag control unit |
| J367 | Battery monitor control unit |
| J500 | Power steering control unit |
| N253 | Battery isolation igniter |
| S131 | Fuse 1 |
| S132 | Fuse 2 |
| S133 | Fuse 3 |
| T2ct | 2-pin connector, black |
| T2cu | 2-pin connector |
| T2em | 2-pin connector |
| T96a | 96-pin connector |
| 624 | Earth point, starter battery |
| B299 | Positive connection 3 (30), in main wiring harness |
| B300 | Positive connection 4 (30), in main wiring harness |
| B301 | Positive connection 5 (30), in main wiring harness |
| B316 | Positive connection 2 (30a) in main wiring harness |
| B699 | Connection 4 (LIN bus) in main wiring harness |
| * | on the battery |
| *2 | gradual introduction |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| S42 | Radiator fan single fuse |
| S104 | Radiator fan fuse for 2nd speed |
| S125 | Glow plug fuse |
| S130 | Secondary air pump fuse |
| T2cn | 2-pin connector |
| T2cnx | 2-pin connector |
| T2kn | 2-pin connector |
| TM | Coupling point in engine compartment |
| TV2 | Terminal 30 wiring junction |
| TV22 | Terminal 30 wiring junction 2 |
| TV32 | Jump start connection |
| B467 | Connection 3, in main wiring harness |
| * | Only models with diesel engine |
| *2 | Only models with petrol engine |
| *3 | Earth supply via housing |
| *4 | Only models with towing bracket |
| *5 | Hot country version |
| *6 | Only models with no towing bracket |
| *7 | Wiring colour depends on equipment |
| EX12 | Parking brake button |
| J126 | Fresh air blower control unit |
| J271 | Main relay |
| J587 | Selector lever sensors control unit |
| J757 | Engine component current supply relay |
| T4f | 4-pin connector |
| T10e | 10-pin connector |
| T10i | 10-pin connector, black |
| T17a | 17-pin connector, white |
| T17ax | 17-pin connector, white |
| T17b | 17-pin connector, red |
| T17bx | 17-pin connector, red |
| TALU | Coupling point on left A-pillar, bottom |
| B318 | Positive connection 4 (30a) in main wiring harness |
| * | see applicable current flow diagram for air conditioning |
| *2 | Only models with petrol engine |
| *3 | Only models with diesel engine |
| E87 | Operating and display unit for front air conditioning system |
| J285 | Control unit in dash panel insert |
| J676 | Chip card reader control unit |
| J764 | Control unit for electronic steering column lock |
| J898 | Control unit for Head-up Display |
| R126 | Telephone bracket |
| R199 | Connection for external audio sources |
| SC | Fuse holder C |
| SC1 | Fuse 1 on fuse holder C |
| SC2 | Fuse 2 on fuse holder C |
| SC3 | Fuse 3 on fuse holder C |
| SC4 | Fuse 4 on fuse holder C |
| SC5 | Fuse 5 on fuse holder C |
| SC6 | Fuse 6 on fuse holder C |
| SC7 | Fuse 7 on fuse holder C |
| SC8 | Fuse 8 on fuse holder C |
| SC9 | Fuse 9 on fuse holder C |
| T4eu | 4-pin connector, brown |
| T4ff | 4-pin connector, blue |
| T4r | 4-pin connector |
| T6au | 6-pin connector |
| T10f | 10-pin connector |
| T10g | 10-pin connector |
| T12a | 12-pin connector |
| T12ax | 12-pin connector |
| T20d | 20-pin connector |
| T32a | 32-pin connector |
| TCPM | Coupling point on dash panel, centre |
| VX452 | Pivot mechanism for display |
| * | Only models with equipment for Japan |
| *2 | According to equipment |
| E1 | Light switch |
| E380 | Multimedia system operating unit |
| E791 | Operating unit 1 for driver and convenience functions |
| J527 | Steering column electronics control unit |
| J794 | Control unit 1 for information electronics |
| J866 | Control unit for electrically adjustable steering column |
| SC | Fuse holder C |
| SC10 | Fuse 10 on fuse holder C |
| SC11 | Fuse 11 on fuse holder C |
| SC12 | Fuse 12 on fuse holder C |
| SC13 | Fuse 13 on fuse holder C |
| SC14 | Fuse 14 on fuse holder C |
| SC15 | Fuse 15 on fuse holder C |
| SC16 | Fuse 16 on fuse holder C |
| T4e | 4-pin connector |
| T5l | 5-pin connector |
| T6a | 6-pin connector, black, on Lambda probe before catalytic converter |
| T8i | 8-pin connector |
| T17e | 17-pin connector |
| T20a | 20-pin connector |
| A1 | Positive connection (30a), in dash panel wiring harness |
| * | Only models with Audi sound system |
| *2 | Only models with 8 loudspeakers (8RM) |
| *3 | Only models with BOSE sound system |
| *4 | Only models with Bang & Olufsen sound system |
| J293 | Radiator fan control unit |
| J671 | Radiator fan control unit 2 |
| N275 | Air filter bypass flap valve |
| SB | Fuse holder B |
| ST1 | Fuse carrier 1 |
| SB11 | Fuse 11 on fuse holder B |
| SB12 | Fuse 12 on fuse holder B |
| SB13 | Fuse 13 on fuse holder B |
| T2ch | 2-pin connector |
| T3au | 3-pin connector |
| T4w | 4-pin connector, black |
| T4y | 4-pin connector, black |
| V50 | Coolant circulation pump |
| B351 | Positive connection 2 (87a) in main wiring harness |
| * | see applicable current flow diagram for engine |
| *2 | Only models with diesel engine |
| *3 | Only models with towing bracket |
| *4 | Hot country version |
| *5 | Only models with no towing bracket |
| *6 | Wiring colour depends on equipment |
| *7 | Only models with petrol engine |
| F265 | Map-controlled engine cooling system thermostat |
| N205 | Camshaft control valve 1 |
| N208 | Camshaft control valve 2 |
| N276 | Fuel pressure regulating valve |
| N290 | Fuel metering valve |
| N316 | Intake manifold flap valve |
| N318 | Exhaust camshaft control valve 1 |
| N319 | Exhaust camshaft control valve 2 |
| T2bh | 2-pin connector, black |
| T2bi | 2-pin connector |
| T2bz | 2-pin connector |
| T2db | 2-pin connector |
| T2dc | 2-pin connector |
| T2dd | 2-pin connector |
| T2de | 2-pin connector |
| T2df | 2-pin connector |
| T10h | 10-pin connector, black |
| T10hx | 10-pin connector, black |
| T14f | 14-pin connector |
| T14fx | 14-pin connector |
| TMO | Coupling point on engine, top |
| TMR | Coupling point in engine compartment, right |
| D95 | Connection (injectors), in engine compartment wiring harness |
| D108 | Connection 6 in engine compartment wiring harness |
| D205 | Connection 3 (87a) in engine prewiring harness |
| * | Only models with petrol engine |
| *2 | Only models with diesel engine |
| *3 | see applicable current flow diagram for engine |
| N80 | Activated charcoal filter solenoid valve 1 |
| N112 | Secondary air inlet valve |
| N345 | Exhaust gas recirculation cooler changeover valve |
| N387 | Exhaust gas recirculation cooling bypass valve 2 |
| N428 | Valve for oil pressure control |
| N489 | Coolant valve for cylinder head |
| N492 | Solenoid for coolant circuit |
| N548 | Crankcase breather shut-off valve |
| T2bw | 2-pin connector |
| T2by | 2-pin connector, black |
| T2ca | 2-pin connector |
| T2da | 2-pin connector |
| T2dg | 2-pin connector |
| T2dh | 2-pin connector |
| T2di | 2-pin connector |
| T2g | 2-pin connector, black |
| T14f | 14-pin connector |
| T14fx | 14-pin connector |
| T14o | 14-pin connector |
| T14ox | 14-pin connector |
| TMO | Coupling point on engine, top |
| D109 | Connection 7 in engine compartment wiring harness |
| D112 | Connection 10 in engine compartment wiring harness |
| * | Only models with diesel engine |
| *2 | Only models with petrol engine |
| G266 | Oil level and oil temperature sender |
| N421 | Magnetic clutch for supercharger |
| T2dk | 2-pin connector |
| T3aq | 3-pin connector, black |
| T4am | 4-pin connector, black |
| T4an | 4-pin connector, black |
| T4t | 4-pin connector, black |
| T6v | 6-pin connector, black |
| T6w | 6-pin connector, black |
| T14f | 14-pin connector |
| T14fx | 14-pin connector |
| TMO | Coupling point on engine, top |
| Z19 | Lambda probe heater |
| Z28 | Lambda probe heater 2 |
| Z29 | Lambda probe 1 heater after catalytic converter |
| Z30 | Lambda probe 2 heater after catalytic converter |
| D106 | Connection 4 in engine compartment wiring harness |
| D107 | Connection 5 in engine compartment wiring harness |
| D196 | Connection 2 (87a) in engine prewiring harness |
| * | Only models with petrol engine |
| *2 | Pre-wired component |
| *3 | see applicable current flow diagram for engine |
| *4 | Only models with diesel engine |
| J521 | Front passenger seat adjustment with memory control unit |
| J648 | Rear left information display and operating unit control unit |
| J844 | Main beam assist control unit |
| SB | Fuse holder B |
| SB1 | Fuse 1 on fuse holder B |
| ST4 | Fuse carrier 4 |
| T4ft | 4-pin connector |
| T4ftx | 4-pin connector |
| T4fz | 4-pin connector |
| T6bj | 6-pin connector, black |
| T6bn | 6-pin connector, black |
| T8l | 8-pin connector, black |
| T16b | 16-pin connector |
| T17o | 17-pin connector, red |
| T17ox | 17-pin connector, red |
| T20n | 20-pin connector, black |
| TSVL | Coupling point for front left seat |
| U31 | Diagnostic connection |
| V389 | Front passenger seat backrest fan |
| V391 | Front passenger seat cushion fan |
| Y7 | Automatic anti-dazzle interior mirror |
| B282 | Positive connection 6 (15a) in main wiring harness |
| M18 | Connection 1, in front passenger seat adjustment wiring harness |
| * | Only models with ventilated seats |
| *2 | Only models with preparation for Rear Seat Entertainment (RSE) |
| *3 | see applicable current flow diagram for air conditioning |
| J136 | Seat and steering column adjustment control unit with memory |
| J533 | Data bus diagnostic interface |
| J649 | Rear right information display and operating unit control unit |
| J869 | Control unit for structure-borne sound |
| SB | Fuse holder B |
| SB2 | Fuse 2 on fuse holder B |
| SB3 | Fuse 3 on fuse holder B |
| ST4 | Fuse carrier 4 |
| T4fu | 4-pin connector |
| T4fux | 4-pin connector |
| T4fy | 4-pin connector |
| T6bi | 6-pin connector, black |
| T6bm | 6-pin connector, black |
| T6z | 6-pin connector, black |
| T17k | 17-pin connector, red |
| T17kx | 17-pin connector, red |
| T20o | 20-pin connector, black |
| T54a | 54-pin connector |
| TSVR | Coupling point for front right seat |
| V388 | Driver seat backrest fan |
| V390 | Driver seat cushion fan |
| B282 | Positive connection 6 (15a) in main wiring harness |
| B283 | Positive connection 7 (15a) in main wiring harness |
| B489 | Connection 25, in main wiring harness |
| M10 | Connection 1, in driver seat adjustment wiring harness |
| * | Only models with 8-cylinder engine |
| *2 | Only models with ventilated seats |
| *3 | Only models with preparation for Rear Seat Entertainment (RSE) |
| E284 | Garage door operating unit |
| J853 | Control unit for night vision system |
| N509 | Gearbox oil cooling valve |
| SB | Fuse holder B |
| SB4 | Fuse 4 on fuse holder B |
| ST4 | Fuse carrier 4 |
| SB5 | Fuse 5 on fuse holder B |
| SB6 | Fuse 6 on fuse holder B |
| SB7 | Fuse 7 on fuse holder B |
| SB8 | Fuse 8 on fuse holder B |
| T2cv | 2-pin connector |
| T3ag | 3-pin connector |
| T3ai | 3-pin connector |
| T6y | 6-pin connector, black |
| T6yx | 6-pin connector, black |
| T12g | 12-pin connector |
| TAG | Coupling point for automatic gearbox |
| V55 | Circulation pump |
| B278 | Positive connection 2 (15a) in main wiring harness |
| * | Only models with garage door opener |
| *2 | According to equipment |
| *3 | Only models with petrol engine |
| *4 | Only models with 6-cylinder engine |
| *5 | Only models with diesel engine |
| J391 | Rear fresh air blower control unit |
| J393 | Convenience system central control unit |
| J525 | Digital sound package control unit |
| J605 | Rear lid control unit |
| J855 | Control unit for front right belt tensioner |
| J882 | Seat heating control unit |
| SF | Fuse holder F |
| SF1 | Fuse 1 in fuse holder F |
| ST1 | Fuse carrier 1 |
| ST2 | Fuse carrier 2 |
| SF2 | Fuse 2 in fuse holder F |
| SF3 | Fuse 3 in fuse holder F |
| SF4 | Fuse 4 in fuse holder F |
| SF10 | Fuse 10 in fuse holder F |
| SF12 | Fuse 12 in fuse holder F |
| S204 | Fuse 1 (30) |
| T3ak | 3-pin connector |
| T3akx | 3-pin connector |
| T4dz | 4-pin connector |
| T5cf | 5-pin connector |
| T10q | 10-pin connector |
| T16o | 16-pin connector, black |
| T32g | 32-pin connector, black |
| T38a | 38-pin connector |
| TIM | Coupling point in interior, centre |
| B315 | Positive connection 1 (30a) in main wiring harness |
| B646 | Connection 3 (seat heating), in main wiring harness |
| * | Automatic air conditioning system, basic Climatronic |
| *2 | see applicable current flow diagram for air conditioning |
| *3 | Only models with Bang & Olufsen sound system |
| *4 | Only models with reducing agent metering system |
| *5 | Only models with BOSE sound system |
| *6 | see applicable current flow diagram for seat heating |
| J345 | Trailer detector control unit |
| J492 | All-wheel drive control unit |
| J857 | Control unit for seat adjustment, row 3 |
| J880 | Control unit for reducing agent metering system |
| SF | Fuse holder F |
| ST2 | Fuse carrier 2 |
| SF5 | Fuse 5 in fuse holder F |
| SF6 | Fuse 6 in fuse holder F |
| SF7 | Fuse 7 in fuse holder F |
| SF8 | Fuse 8 in fuse holder F |
| SF9 | Fuse 9 in fuse holder F |
| SF10 | Fuse 10 in fuse holder F |
| SF11 | Fuse 11 in fuse holder F |
| SF12 | Fuse 12 in fuse holder F |
| T4fs | 4-pin connector |
| T6d | 6-pin connector |
| T46b | 46-pin connector, black |
| T47a | 47-pin connector |
| B315 | Positive connection 1 (30a) in main wiring harness |
| * | Only models with towing bracket |
| *2 | Only models with all-wheel drive |
| *3 | According to equipment |
| *4 | Only models with reducing agent metering system |
| J502 | Tyre Pressure Monitoring System control unit |
| J769 | Lane change assist control unit |
| J770 | Lane change assist control unit 2 |
| R86 | Aerial amplifier for mobile telephone |
| SF | Fuse holder F |
| SF1 | Fuse 1 in fuse holder F |
| SF2 | Fuse 2 in fuse holder F |
| SF3 | Fuse 3 in fuse holder F |
| ST3 | Fuse carrier 3 |
| SF4 | Fuse 4 in fuse holder F |
| SF5 | Fuse 5 in fuse holder F |
| SF6 | Fuse 6 in fuse holder F |
| SF7 | Fuse 7 in fuse holder F |
| SF8 | Fuse 8 in fuse holder F |
| T4fk | 4-pin connector |
| T4k | 4-pin connector |
| T8f | 8-pin connector |
| T8g | 8-pin connector |
| T14c | 14-pin connector |
| T14cx | 14-pin connector |
| T16c | 16-pin connector, brown |
| T16cx | 16-pin connector, brown |
| THRL | Coupling point in luggage compartment, left |
| THRR | Coupling point in luggage compartment, right |
| B315 | Positive connection 1 (30a) in main wiring harness |
| X270 | Connection (30), rear bumper wiring harness |
| * | Only models with lane change assist |
| *2 | Only models with Tyre Pressure Monitoring System |
| *3 | Only models with preparation for Rear Seat Entertainment (RSE) |
| *4 | Only models with petrol engine |
| *5 | According to equipment |
| J530 | Garage door operation control unit |
| J772 | Reversing camera system control unit |
| J854 | Control unit for front left belt tensioner |
| J928 | Control unit for overhead view camera |
| R78 | TV tuner |
| R161 | DVD changer |
| SF | Fuse holder F |
| ST3 | Fuse carrier 3 |
| SF9 | Fuse 9 in fuse holder F |
| SF10 | Fuse 10 in fuse holder F |
| SF11 | Fuse 11 in fuse holder F |
| SF12 | Fuse 12 in fuse holder F |
| SF13 | Fuse 13 in fuse holder F |
| SF14 | Fuse 14 in fuse holder F |
| SF15 | Fuse 15 in fuse holder F |
| SF16 | Fuse 16 in fuse holder F |
| T5ce | 5-pin connector |
| T5d | 5-pin connector |
| T8o | 8-pin connector, black |
| T10l | 10-pin connector |
| T12h | 12-pin connector |
| T18e | 18-pin connector, black |
| * | Only models with DVD player |
| *2 | Only models with TV tuner |
| *3 | Only models with garage door opener |
| *4 | Only models with reversing camera system |
| *5 | Only models with overhead view camera |
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