Ha, Morat, tell me about breaking bolts and stuff. I posted my fun and games when refitting the sunroof cassette yesterday, in the " Roof lining retrim" thread.
I had a lot of aggravation trying to refit the sunroof motor, which turned out to be the dumb-ass method of using rivnuts in a metal mounting plate. If you haven't done this job it is one to take care with. There are three plastic spacers, which just pressed into the motor legs and are a loose fit. They are also suicidal:
The bolts that you see have about 5mm thread to go into the rivnuts, but if you apply even a little bit too much torque then "boing", away goes the thread. Those bolts are about 4mm thread and give way far too easily. Then the motor drops a bit and away goes the plastic spacer. In my case one spacers disappeared under the passenger seat and down under the plastic heater vents under the seat. The second one legged it behind and under the brain-box under the drivers' seat !!!
Then I had to find three 4.5 self-tappers to replace the bolts with something a bit more "butch". The motor is now firmly held and working OK.
I probably spent more than an hour looking for both the original bolts, and spacers, during the afternoon. I was getting really cheesed off before I eventually decided it was time to go down the DIY route and make up bigger screws. One thing that was important was grinding down the self-tappers to avoid them being too long and screwing into the car roof !!
Pierre3.