Problems with the seat ventilation
The seat ventilation has switched off prematurely or cannot be switched on. The vehicle's electrical system voltage is too low because too many electrical consumers are switched on.
•► Switch off electrical consumers which you do not need, such as the rear window defroster or interior lighting.
See also:
Interior
The M-Class seats five people on front buckets and a three-place split rear
seat that folds to expand cargo space to 81.2 cubic feet. An optional two-place
third-row seat increases passenger capac ...
Roadside Assistance button
Open the stowage compartment under the
armrest.
Press and hold Roadside Assistance
button 1 for more than two seconds.
This initiates a call to the Mercedes-Benz
Customer Assistance Center ...
Standard display
Press and hold the button on
the
steering wheel until the Trip menu with
odometer 1 and trip odometer 2 is
shown. ...