Activating/deactivating DSR (vehicles with E-Active Body Control)
Requirements:
You are driving at 40 km/h or slower.
If the current vehicle speed is too high, the Max. speed 40 km/h message appears in the multifunction display.
You have not selected drive program
or 
. Active Distance Assist DISTRONIC is deactivated.
To activate:
pull rocker switch 
. Indicator lamp 
lights up.
The 
symbol appears in the multifunction display.
To deactivate:
pull rocker switch . Indicator lamp and the symbol go out.