AW: A highly interesting feature for motor home use is the allocation of the CAM key to the rear view camera (if installed), which allows, during normal driving, to invoke the rear camera picture with the keystroke at any time, e.g. direct manual operation. In addition to automatic function during parking, the manual CAM button allows, while driving to observe the traffic behind the vehicle and replaces the rear view mirror. It also allows a survey of the trailer or bike carrier – and – the more simple coupling process of trailers having a ball head, is another advantage.