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 QuattroFACTORY OEM SERVICE PROCEDURE
Coding Control Module
- Initiate central locking system On Board Diagnostic (OBD). See INITIATING CENTRAL LOCKING SYSTEM ON BOARD DIAGNOSTIC (OBD) under RETRIEVING DIAGNOSTIC TROUBLE CODES.
- Press buttons 0 and 7 to select "Code Control Module" function 07 and press Q button to confirm input.
- Enter 5-digit code. Fill empty positions with "0" (example: 16140).
- Press Q button to confirm input.
- The code module identification with coding value just entered is displays. Press right arrow button.NOTE: In the function "Read Measuring Value Block, Display Group 004" the coding for the central locking system can be checked. See READ MEASURING VALUE BLOCK (SCAN TOOL FUNCTION 08) under PROGRAMMING.
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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