C-class engines are optionally equipped with an automatic transmission. The automatic transmission has three selective speed preselection ranges that are automatically engaged.
For quick acceleration, for example, when overtaking, a so-called switch for sharp pressing all the way on the accelerator pedal, Kickdown, is installed in the automation system, which turns on when the accelerator pedal is fully depressed. This effect ensures that the transmission either stays further in the momentary gear mode or returns from a higher gear to a lower gear.
To assess the functioning of an automatic transmission and to correctly troubleshoot, experience with automatic transmissions and knowledge of the principle of their operation is necessary. Since this topic can only be comprehended with extensive professional experience, only some of the verification operations are described below.