Mercedes-Benz CLS-Class 2013 Owners Manual - Manual (Page 94)

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 (
Y page 91).
X If this is not the case, repeat the steps
above again.
92
Sliding sunroof
Opening/closing