Transmission Control

Transmission Control

The gearbox is controlled by the Mechatronic Module that is a combination of the valve body and electronic control module. The following system overview shows the main components of the electronic control system.

The driver's request is transmitted in the form of an electrical signal from the selector lever on the steering column or from several control buttons in the multifunction steering wheel. The signals are transferred over the CAN bus to the transmission control module. In the gearbox, the commands are implemented while evaluating various ambient conditions. The relevant positions are indicated in the instrument cluster.

Pure electronic transmission control (shift by wire) eliminates the conventional gearshift lever in the center console and all of the associated components. There are additional safety enhancements, for example the automatic parking lock is active when the ignition key is removed. In the event of faults or complete failure of electrical connections or system components, numerous measures are provided:

- An additional serial data link (hard wire) between the selector lever and Mechatronic
- The display of error messages in the instrument cluster and/or in the CC display
- The mechanical emergency park release