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.