Vehicle service system and method for testing and maintenance of a component especially for a functional component or a drive unit

The invention relates to a service interface device for service systems of drive components, in particular for use in vehicles. According to the invention, it comprises means for coupling with a control device (12) associated with the drive component (9) for reading out at least part of the variables describing the operating and/or functional mode of the drive component at least indirectly, and means for wireless data transmission (16,17) to an evaluation and/or monitoring and/or control system (15).