Towbar wirings accessories
PDC... modules should be used when "simple" disconnection of PDC unit of rear park-sensors (directly using of output from WHxS/MPxS modules) makes a troubles - like eg. signalling the device malfunction in car.
Extension kits for installation if you have a G8 trailer socket (13-pin socket, but with wires for trailer lights only) to upgrade to the G13 standard.
The trailer's socket testers (13-pins and 7-pins) allows to check operation of installed towbar kits.