1. In a motor vehicle, a control system for controlling at least one part of the vehicle comprising: a plurality of sensor systems mounted at different locations on the vehicle, each of said sensor systems providing a measurement related to a state of said sensor system or a measurement related to a state of the mounting location; and a processor coupled to said sensor systems and arranged to diagnose the state of the vehicle based on the measurements of said sensor systems; said processor being arranged to control the at least one part based at least in part on the diagnosed state of the vehicle.