Parameters, Status: Notes

When reading off signals activated by the trailer module (TRM), there should not be any trailer connectors plugged into the socket of the vehicle's tow hitch. The trailer connector may only be plugged into the socket if the cable harness and its connectors are checked and fault-free.

The socket for the tow hitch connector is available in several variants with different numbers of poles. The output signals for back-up (reversing) lamps, fog lamps and charging (+12 V) is market dependent.