Mercedes-Benz 2008 M-Class Operator's Manual page 244

Switch off the ignition ( page 40).
Remove the SmartKey from the starter
switch.
Vehicles with KEYLESS-GO*:
Switch off the ignition ( page 41).
Open the driver's door (this puts
the starter switch in position 0,
same as with the SmartKey
removed from the starter switch).
The driver's door then can be
closed again.
Remove the fuse for the tilt/sliding
sunroof from the fuse box
( page 504).
i
For information on which fuse box contains
the fuse for the power tilt/sliding sunroof, see
the fuse chart provided with the vehicle tool kit
( page 448).
Reinsert the fuse in the main box.
Switch on the ignition ( page 40).
Press and hold the sunroof switch in
the direction of arrow 3 ( page 241)
until the tilt/sliding sunroof is fully
raised at the rear.
Hold the sunroof switch in the direction
of arrow 3 for approximately
1 second.
Open the tilt/sliding sunroof using the
Express-open feature ( page 242).
If the tilt/sliding sunroof opens
completely, it is synchronized.
If the tilt/sliding sunroof does not open
completely:
Repeat the above steps.
Controls in detail
Power tilt/sliding sunroof
243