Trailer detection

The trailer module (AHM) detects a trailer as connected when at least two loads (cold measurement) are detected at the lighting outputs. The trailer module (AHM) then reports the status "Trailer connected". This status report is implemented in the towing vehicle in a number of control units. For example, the park distance control function is deactivated at the rear.

Vehicles up to version 2006: When towing a trailer, the reversing light and rear fog light of the towing vehicle are deactivated. Vehicles from version 2006: The reversing light is no longer deactivated. If the rear fog light on the trailer fails, there is a switch to the rear fog light of the towing vehicle.