Resetting
Reset the sliding sunroof if it does not move smoothly.
Turn the SmartKey to position 2 in the
ignition lock.
Raise the sliding sunroof fully at the rear.
Keep the 
switch pressed for
another
second.
Make sure that the sliding sunroof can be
fully opened and closed again.
If this is not the case, repeat the steps
above again.
If the sliding sunroof still cannot be
opened or closed fully after resetting,
contact a qualified specialist workshop.
See also:
Cleaning the steering wheel and gear orselector lever
► Thoroughly wipe with a damp cloth or
use
leather care agents that have been
recommended and approved by Mercedes-
Benz. ...
Vehicle level
Important safety notes
Your vehicle regulates its height
automatically. All-round self-leveling ensures
the best possible suspension and constant
ground clearance, even with a laden vehicle.
W ...
Cleaning the sensors
► Clean sensors 1 of the driving systems
with water, car shampoo and a soft cloth.
When cleaning the sensors with a power
washer, maintain a distance between the
vehicle and the nozzle ...