Diagnostic and Serviecesystem for a motor vehicle

In known methods of the prior art measures are only performed when a triggering event is present, so if, for example, sample values ​​indicative of at least a potential difference of an operating component from its desired operating condition. The inventive method for operating a diagnostic and service system in a motor vehicle, initiated in which to check diagnostic and / or calibration actions and / or measurements and consequent reactions and results recorded in evaluation units are stored and processed further is characterized in that that these actions and / or measurements are made in the resting phase of the vehicle. The invention is particularly suitable for operating a diagnostic and service system in a motor vehicle.