If the glass or shade stops part-way, it has probably lost its end points. This reset teaches them again.
- Make sure the roof and its edges are clear of hands, bags and ice, and the car is parked.
- Hold the open control until the glass is fully open, and keep holding for a few seconds.
- Hold the close control until it is fully closed, and keep holding for a few seconds.
- Test it once with a short press. Repeat the reset if it still stops.
Tip. If it still jams, makes a grinding noise or leaks, stop using it and contact your dealer.
If unsure, stop safely and contact your dealer.
Written in our own words from public sources and owner experience. Not taken from any manual.