In a process for monitoring motor vehicles of a motor vehicle fleet which is operated by a fleet operator, by way of a sensor system in the respective vehicle of at least a part of the vehicle fleet, vehicle-related data of the vehicle are determined. The vehicle-related data includes at least its geographical position. By use of at least a portion of the vehicle-related data, a number of servicing parameters are determined, which describe the service requirement of the respective vehicle. By using a data network, by way of which the respective vehicle and a user interface assigned to the fleet operator communicate, the number of servicing parameters and the geographical position of the respective vehicle are output by way of the user interface.