Grinds or stops halfway, usually after a lot of cycles
Guides · cables · drive motorHow it shows up
The front panel scrapes as it slides, stops short of fully open, or comes back crooked and leaves a gap at one corner. Some arrive tilting happily but refusing to slide at all. Others do nothing but click once from above the headlining and stop there.
Why it gets misread
Replacing the motor is the usual first move, and on an R56 that is rarely the whole story: the motor and its cables have aged side by side, so a fresh motor pushed against a stretched cable and a worn guide is back in the workshop within months. We would rather find out which of the three has actually gone before anyone pays for any of them.
How we fix it
The headlining comes down, which on a car this size is a shorter job than on a full-size SUV. Guides cleaned or renewed, cables measured for stretch, the motor bench-tested on its own, the panel realigned and the roof taught its open and closed positions again. Then it runs a dozen full cycles and gets water-tested before it goes anywhere. Covered by our parts & labour warranty, and if the roof ever misbehaves after, you call us first.