Originally posted by 1994C220
I am an amateur mechanic, and I do mean amateur...but I love working on my mercedes....
I am the same way! I would not have the slightest idea where to start looking for the vacuum problem...
As for the sunroof, I would get above the car and see if you can find any obstructions or anything? And definitly grease the rails (you should use Mercedes-Benz grease).
Try closing the sunroof using the convenience feature (key in door) and see if it closes any differently. This will help determine if you switch is *possibly* the culprit. Doesn't sound like it, but we might as well rule out all possibilities if you're stumped!
Also, the door panel needs 4 screws removed:
1 on trim by door latch,
1 on the bottom below the speaker
1 under the armrest
1 behind the door handle (must pop out plastic backing with flathead)
Then the rest is snapped on... you need to release these and then pull slightly upwards before pulling out.