1 to 399
No. Name Location1 Battery in engine bay
2 Generator T8: on the front long side of the engine (right)
2 Generator PSG16: on the rear long side of the engine (right)
4 Starter motor T8: on the front long side of the engine (left)
4 Starter motor PSG16: on the rear long side of the engine (right)
10 Light switch in the light switch unit between the steering wheel and driver's door
11 Main beam lamp in the headlamp module
11a Xenon headlamp lamp in the headlamp module
12 Dipped beam lamp in the headlamp module
13 Parking light front: in the headlamp module
13 Parking light rear: in the rear wing's light cluster
15 Number plate lighting bulb in the boot lid's handle unit
16 Rheostat, lighting for controls in the control panel for SID
19 Glove box lighting bulb in side wall of the glove box
20 Ignition switch module, in the floor console between the front seats
21 Relay, +54 in fuse box in the dashboard
22 Main fuse box in the dashboard on the short side of the dashboard by the left door
24 Direction indicators switch to the left in the steering column unit
25 Hazard warning lights switch in the ACC/MCC control module
27 Direction indicator bulb front: in the headlamp module
27 Direction indicator bulb rear: in the rear wing's light cluster
29 Brake light switch on pedal bracket
30 Brake light bulb in the rear wing's light cluster
30RC Bulb, elevated brake lights above the rear window
31 Reversing light switch on the gearbox
32 Reversing light bulb in the boot lid's light cluster
33 Rear fog light bulb in the boot lid's light cluster
36 Ventilation fan motor on the underside of the fan housing
37LH Left radiator fan motor on left side of the radiator
37RH Right radiator fan motor on right side of the radiator
38 Air recirculation fan motor on the outer end of the fan housing
40LH Left horn on the left behind the grille
40RH Right horn behind right-hand fog light
41 Horn switch in steering wheel rim
42 Brake fluid level switch on brake fluid reservoir
43 Handbrake switch under floor console by handbrake
44 Engine oil pressure switch petrol: by the front edge of the oil filter
44 Engine oil pressure switch diesel: under the generator
46 Fuel level sensor integrated in the fuel pump unit 689
47a Level sensor, fuel in the main instrument unit
47c Temperature sensor, coolant in the main instrument unit
47o Warning light, CHECK ENGINE in the main instrument unit
48 Cigarette lighter by the ashtray
50F Front roof light bulb in front roof console
50R Rear roof light bulb in the roof light unit
53 Interior lighting switch in front roof console
54 Door switch in the central locking system motor
54D Contact, door, driver in the central locking system motor
54H Contact, boot lid in the central locking system motor
54P Contact, door, passenger in the central locking system motor
54RL Contact, door, rear, LH in the central locking system motor
54RR Contact, door, rear, RH in the central locking system motor
55 Luggage compartment lighting bulb under the parcel shelf
61 Windscreen wiper switch to the right in the steering column unit
62F Windscreen wiper motor LHD: in engine bay on right of bulkhead partition
62F Windscreen wiper motor RHD: in engine bay on left of bulkhead partition
63b Windscreen washer fluid pump motor on washer fluid reservoir in the left wheel housing
64A Seat cushion heating pad in the seat cushion
64B Backrest heating pad in the backrest
64FL Seat cushion heating pad in the seat
64FR Seat cushion heating pad, RH in the seat
68 Horn relay, in engine bay electrical centre 342
70D Driver's seat-belt contact in driver's seat-belt buckle
70P Passenger seat-belt contact in seat-belt buckle on passenger seat
77 Automatic transmission immobilizer switch (in 245) Transmission range switch on transmission
83 Windscreen wiper relay in engine bay electrical centre 342
85FL Left fog light bulb to the left in spoiler under front bumper
85FR Right fog light bulb to the right in spoiler under front bumper
88 Fog light switch in the light switch unit between the steering wheel and driver's door
89LH Left side direction indicator bulb on left front wing
89RH Right side direction indicator bulb on right front wing
91 Selector lever position indicator lighting bulb at the gear selector
102 Fuel pump relay petrol: below the right A-pillar
102 Fuel pump relay diesel: in engine bay electrical centre 342
110 Tachometer in the main instrument unit
111 Speedometer in the main instrument unit
113 Electrically heated rear window relay main fuse box in the luggage compartment
115 Rear window heating element in rear window
116 Rear window switch in the MCC/ACC panel
124 Electrically adjustable door mirror switch in driver's door by door mirror
126 Electrically adjustable door mirror motor in door mirror
126D Motor, electrically adjustable door mirror, driver's side in door mirror
126P Motor, electrically adjustable door mirror, passenger side in door mirror
133 Clutch switch, cruise control on pedal bracket
134 Brake switch, cruise control on pedal bracket
141 Cruise control switch integrated in the switch for the direction indicators
148 Ashtray/cigarette lighter lighting bulb by the ashtray
156 A/C compressor relay, petrol: in the main fuse box in front of battery
156 A/C compressor relay, diesel: in engine bay electrical centre 342
161 Rear fog light switch in the light switch unit between the steering wheel and driver's door
164D Motor, electric window lift, driver's side in the driver's door
164P Motor, electric window lift, passenger side in the passenger door
164RL Motor, electric window lift, rear, LH in the rear LH door
164RR Motor, electric window lift, rear, RH in the rear RH door
169 A/C switch in the MCC/ACC panel
170 A/C compressor, on the front long side of the engine (right)
179a Charge air solenoid valve, petrol: on the vacuum box for turbo unit
179a Charge air solenoid valve, diesel: in front of the glow plug control module on the battery's radiation shield
181 Electrically operated sunroof switch in front roof console
182 Sunroof unit in front of sunroof assembly
182a Sunroof motor in the sunroof module
182b Sunroof control module in the sunroof module
184 Central locking system motor in the central locking system module
184D Motor, centrally operated lock, driver's door in the central locking system module
184H Motor, central locking system, tailgate in the central locking system module
184P Motor, centrally operated lock, passenger door in the central locking system module
184RL Motor, centrally operated lock, rear, LH in the central locking system module
184RR Motor, centrally operated lock, rear, RH in the central locking system module
195 Washer fluid level switch in washer fluid reservoir in the left front wheel housing
202 Coolant temperature sensor, petrol: on the engine's top right front corner
202 Coolant temperature sensor, diesel: on the thermostat housing
205 Mass air flow sensor at right-hand MacPherson strut tower
206a Injector, cyl. 1 on top of intake manifold
206b Injector, cyl. 2 on top of intake manifold
206C Injector, cyl. 3 on top of intake manifold
206D Injector, cyl. 4 on top of intake manifold
207 Heating element, door mirror on the rear of the mirror glass
207D Heating element, door mirror, drivers side on the rear of the mirror glass
207P Heating element, door mirror, passenger side on the rear of the mirror glass
209D Lamp, footwell lighting, driver's side in the driver's door
209P Lamp, footwell lighting, passenger side in the passenger door
215 Dipswitch integrated in the switch for the direction indicators
216 ACC control module, in the centre of the dashboard
217LH Temperature sensor, mixed-air, floor, LH in the climate housing's left floor outlet
217RH Temperature sensor, mixed-air, floor, RH in the climate housing's right floor outlet
218 Cabin temperature sensor in front roof console
220a Ventilation fan control, MCC component: in the lower edge of the fan housing
220a Ventilation fan control, MCC connector: middle of the floor channel
220b Ventilation fan control, ACC on the fan motor cowling
221 Motor, air distribution flap on the right of the climate housing
222 Motor, mixed air flap, MCC on the left of the climate housing
222LH Left mixed-air damper motor below the motor on the left of the climate housing
222RH Right mixed-air damper motor below the motor on the right of the climate housing
223 Solar sensor top centre of dashboard
225 Reading lamp front: in the front roof console
225 Reading lamp rear: in the dome light
229 Engine control system main relay petrol: in the main fuse box in front of battery
229 Engine control system main relay diesel: in engine bay electrical centre 342
234FL Left side marker light bulb in the front spoiler
234FR Right side marker light bulb in the front spoiler
236D Driver's seat-belt tensioner, in the driver's B-pillar
236P Passenger seat-belt tensioner, in the passenger's B-pillar
236RD Seat-belt tensioner, rear seat, driver's side under the parcel shelf
236RP Seat-belt tensioner, rear seat, passenger side under the parcel shelf
242 Coolant level switch, in coolant expansion tank
243 Engine oil level switch petrol: at the bottom of front edge of the oil pan
243 Engine oil level switch diesel: centre of the front edge of the oil pan above the oil temperature sensor
245 Automatic transmission, transmission range switch on the automatic transmission in engine bay
254 Seat heating pad temperature sensor, in seat cushion
266FC Centre dashboard speaker top centre of dashboard
266FL Left dashboard speaker, to the left in dashboard
266FR Right dashboard speaker, to the right in dashboard
266LH Front left door speaker in door
266RH Front right door speaker in door
266RL Speaker, rear, LH to the left in the parcel shelf
266RLW Speaker, woofer, rear, LH to the left in the parcel shelf
266RR Speaker, rear, RH to the right in the parcel shelf
266RRW Speaker, woofer, rear , RH to the right in the parcel shelf
271 Heated oxygen sensor element integrated in the oxygen sensor
275 Anti-theft alarm siren in the rear right wheel housing
276 Anti-theft alarm bonnet switch, behind the battery's positive pole
280 Beam length adjustment motor in the headlamp module
282 Headlamp levelling switch in the light switch unit between the steering wheel and driver's door
283 Odometer in the main instrument unit
286 Outdoor air temperature sensor, in centre of the front spoiler
298FL Wheel speed sensor, front, LH integrated in wheel hub
298FR Wheel speed sensor, front, RH integrated in wheel hub
298RL Wheel speed sensor, rear, LH integrated in wheel hub
298RR Wheel speed sensor, rear, RH integrated in wheel hub
305 Anti-theft alarm LED (Light Emitting Diode) in SID
320a Ignition coil with integrated power stage, cyl 1 on the spark plug
320b Ignition coil with integrated power stage, cyl 2 on the spark plug
320C Ignition coil with integrated power stage, cyl 3 on the spark plug
320D Ignition coil with integrated power stage, cyl 4 on the spark plug
321 EVAP canister purge valve on hose to mass air flow sensor
323 Fuel pump motor integrated in the fuel pump unit 689
323a Motor, fuel pump, auxiliary/parking heater petrol: under the floor on the RH side in front of the fuel tank
323a Motor, fuel pump, auxiliary/parking heater diesel: in the fuel tank
324 Secondary air injection pump relay in the main fuse box in front of battery
326 Secondary air injection pump motor above the starter motor
328D Crash sensor, side, front, driver's side in the lower edge of the driver side's B-pillar
328P Crash sensor, side, front, passenger side in the lower edge of the passenger side's B-pillar
328RD Crash sensor, side, rear, driver's side under the C-pillar by the lower edge of the back seat
328RP Crash sensor, side, rear, passenger side under the C-pillar by the lower edge of the back seat
331 Airbag control module, on the centre tunnel behind the gear selector unit
332FL Crash sensor, front, LH on the bumper member under the left horn
332FR Crash sensor, front, RH on the bumper member under the right horn
333D Driver airbag in steering wheel
333Db Driver side airbag, in driver's seat
333P Passenger airbag, in the dashboard
333Pb Front passenger side airbag in passenger seat
336 Steering wheel contact unit integrated in steering column unit
336a Steering wheel contact unit airbag integrated in steering column unit
336b Steering wheel contact unit, horn/switches integrated in steering column unit
342 Electrical centre, engine bay next to the battery
345 Crankshaft position sensor petrol: above the starter motor
345 Crankshaft position sensor diesel: under the oil filter
353 Entertainment Head Unit in the centre console
354F Front speaker amplifier under left-hand seat
354R Rear speaker amplifier behind the rear left wheel housing
355F Front CD player/changer lowest in the centre of the dashboard
357 Electrically adjustable seat switch on side of seat towards the door
357a Motor, longitudinal adjustment, electrically adjustable seat in seat under the cushion
357b Motor, tilt adjustment, electrically adjustable seat in seat under the cushion
357C Motor, height adjustment, electrically adjustable seat in seat under the cushion
357d Motor, backrest adjustment, electrically adjustable seat in seat under the cushion
357D Switch, electrically adjustable seat with memory, driver on side of seat towards the door
357Da Motor, longitudinal adjustment, electrically adjustable seat with memory, driver in seat under the cushion
357Db Motor, tilt adjustment, electrically adjustable seat with memory, driver in seat under the cushion
357Dc Motor, height adjustment, electrically adjustable seat with memory, driver in seat under the cushion
357Dd Motor, backrest adjustment, electrically adjustable seat with memory, driver in seat under the cushion
357De Position sensor, longitudinal adjustment, electrically adjustable seat with memory, driver on motor shaft
357Df Position sensor, tilt adjustment, electrically adjustable seat with memory, driver on motor shaft
357Dg Position sensor, height adjustment, electrically adjustable seat with memory, driver on motor shaft
357Dh Position sensor, backrest adjustment, electrically adjustable seat with memory, driver on motor shaft
357Dj Switch, memory, electrically adjustable seat with memory, driver on side of seat towards the door
357Dk Control module, electrically adjustable seat with memory, driver in seat under the cushion
359LH Vanity mirror lighting bulb, LH in sun visor
359RH Vanity mirror lighting bulb, RH in sun visor
361 Lighting socket 12 V bulb by the socket
375 Mobile telephone connection by the radio unit
379 Accelerator pedal position sensor on pedal bracket
382 Traction Control System, TCS integrated in the hydraulic unit behind the engine bay electrical centre 342
388 Boot lid switch in the driver's door
398a Glow plug, cylinder 1 in the top rear of the cylinder head
398b Glow plug, cylinder 2 in the top rear of the cylinder head
398C Glow plug, cylinder 3 in the top rear of the cylinder head
398d Glow plug, cylinder 4 in the top rear of the cylinder head