Mercedes-Benz CLS Operator's Manual page 94

Sliding sunroof
92
Reset the sliding sunroof if it does not move
smoothly.
X
Turn the SmartKey to position 2 in the
ignition lock.
X
Raise the sliding sunroof fully at the rear
( Y page 91).
X
Keep the 3 switch pressed for another
second.
X
Make sure that the sliding sunroof can be
fully opened and closed again (
X
If this is not the case, repeat the steps
above again.
Y page 91).