Automatic Range Adjustment (Bi-Xenon)

There are two motors on the reverse of the headlamps. These angle the headlamps upwards or downwards to control the range of the beam.

The motors are controlled by signals from a position sensor at the rear axle. The sensor detects the angle of the car under different load conditions and sends this information so that the central electronic module (CEM) can determine whether the lamps need to be raised or lowered.

For further information about the inner roof lighting, see Design and Function, rear electronic module (REM).

There are diagnostics for the headlamp range adjustment.