Sliding/pop-up roof design - GF77.20-P-4100-03PPP
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The sliding/pop-up roof is driven by a DC motor with thermal protection switch, the roof system motor (M12m1)
Hall sensor 1 (M12b1) and Hall sensor 2 (M12b2) are located on the motor shaft for position measurement; these values are also used for excessive force limitation and for pinch protection (M12b3).