Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI1999A8 QUATTROREPAIR AND DIAGNOSIS (SINGLE PAGE)ELECTRICALCOMPONENT LOCATIONSELECTRICAL COMPONENT LOCATORCONTROL UNITS
1999 Audi A8 Quattro
Control Units
1999 Audi A8 QuattroSECTION Control Units
CONTROL UNITS LOCATION
| Component | Component Location |
|---|---|
| ABS Control Module (W/EDL) | Below left side of dash. See Figure . |
| Air Bag Control Module | Below center of dash, on transmission tunnel. See Figure . |
| Central Locking/Alarm System/Interior Light Delay Module | At left side of luggage compartment, near wheelwell. See Figure . |
| Cruise Control Module | In plenum chamber E-box, at right rear of engine compartment. |
| Fresh Air Blower Control Module | At right rear of engine compartment, in fresh air intake. |
| Front Lamp Control Module | On right front footwell E-box relay panel. |
| Front/Rear Fog Light Control Module | On right front footwell E-box relay panel. |
| Headlight Beam Adjusting Control Module | At base of right "B" pillar, behind trim. |
| High Intensity Gas Discharge Lamp Control Module (Left/Right) | Behind respective headlight assembly. |
| Lamp Control Module | On right front footwell E-box relay panel. |
| Memory Seat Control Module | On bottom of left front seat. |
| Mirror Fold-Away Function Control Module | On right front footwell E-box relay panel. |
| Mirror Memory Control Module | At base of left "B" pillar, behind trim. See Figure . |
| Motronic Engine Control Module | In plenum chamber E-box. See Figure . |
| Multifunction Steering Wheel Control Module | On relay panel. See Figure . |
| Power Sunroof Control Module | Above interior light assembly, forward of sunroof. |
| Power Window Control Module (4) | Integral with window motor, in respective door. |
| Rear Window Shade Control Module | Below right side of rear parcel shelf. See Figure . |
| Servotronic Control Module | On right front footwell E-box relay panel. See Figure . |
| Steering Column/Belt Height Control Module | Below left front seat. See Figure . |
| Transmission Control Module | In plenum chamber E-box. See Figure . |
| Ultrasound Control Module | At left side of luggage compartment. See Figure . |
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.