See also:

Problems with the SmartKey
Problem Possible causes/consequences and Solutions You cannot lock or unlock the vehicle using the SmartKey. The SmartKey battery is discharged or nearly discharged. ...

Overview
The on-board computer is activated as soon as you turn the SmartKey to position 1 in the ignition lock. You can control the multifunction display and the settings in the on-board computer using t ...

Cruise control lever
Cruise control lever 1 To store the current speed or a higher speed 2 To store the current speed or a lower speed 3 To deactivate DISTRONIC PLUS 4 To store the current speed or to call up the la ...