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.
1999 Audi A8 BaseFACTORY OEM SERVICE PROCEDURE
Central locking system, assembly overview: Notes
NOTE:
The following list refers to Fig 1
.
- Vacuum line
- Left and right-front door actuator
- Removing and installing. See REMOVING AND INSTALLING FRONT DOOR LOCK ACTUATOR .
- Disengaging Bowden cable for interior door mechanism. See REMOVING AND INSTALLING BOWDEN CABLE FOR INSIDE DOOR MECHANISM .
- Left and right-rear door actuator
- Removing and installing. See REMOVING AND INSTALLING LOCK ACTUATOR FOR REAR DOOR .
- Disengaging Bowden cable for interior door mechanism. See REMOVING AND INSTALLING BOWDEN CABLE FOR INSIDE DOOR MECHANISM .
- Fuel filler flap lock actuator
- Removing and installing. See REMOVING AND INSTALLING FUEL FILLER FLAP LOCK ACTUATOR .
- Rear lid lock actuator
- Removing and installing. See REMOVING AND INSTALLING REAR LID LOCK ACTUATOR .
- Vacuum line routing. See VACUUM LINE ROUTING IN REAR LID .
- Pump for central locking system
- Removing and installing. See REMOVING AND INSTALLING PUMP FOR CENTRAL LOCKING SYSTEM .
- Rear distribution box
- Securely attached to vacuum lines, with exception of rear lid line
- Allows for disconnection of vacuum line connector to rear lid. See DISCONNECTING VACUUM LINES .
- Front distribution box
- Securely attached to vacuum lines, with exception of rear distribution box
- Allows for disconnection of vacuum line connector to rear lid. See DISCONNECTING VACUUM LINES .
Factory Service Tools
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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.
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