Disabling System
WARNING: This page is about a different car, the 2003 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
Before proceeding, see AIR BAG SAFETY PRECAUTIONS . If equipped with MK3 navigation system, turn ignition off and wait one minute for system to complete power-down procedure. On all models, retrieve and record any fault codes. Obtain radio anti-theft code. Record programmed radio stations. Ensure ignition is off. Disconnect and shield the negative battery cable. Wait at least 5 seconds before servicing vehicle.