Lamp in the exterior mirror housing
Information stage The dimmed lamp in the exterior mirror housing indicates when there are vehicles in the blind spot or approaching from behind.
Warning If the turn signal is set while a vehicle is in the critical zone, the steering wheel vibrates briefly and the lamp in the exterior mirror housing flashes brightly.
The warning stops when the turn signal is switched off, or the other vehicle leaves the critical zone.
BMW X3 Service & Repair Manual > Troubleshooting: Contents of engine electrical system general
General Information
WORKING ON IGNITION SYSTEM
REMOVING AND INSTALLING ELECTRONIC CONTROL UNITS
WELDING WORK (overload protection of control units)
Disconnecting and connecting battery
DISCONNECTING AND CONNECTING TEST EQUIPMENT
COMPONENT INSPECTION
EXTERNAL JUMP-STARTING AID
Comp ...