I tried to open the roof on my 1998 SLK230 Kompressor last night, but it would not go through the cycle. The windows went down and the trunk section went up, but after that there was a whirring sound and nothing. The roof did not detach from the front. The trunk section goes down and windows go back up if I reverse the procedure.

I read some of the old posts and am wondering if a problem I had several months ago could be affecting the roof. I had an alternator relay switch go bad and the battery was without power until we got the switch replaced. Would this affect the relay switches for the roof? If so, is it very expensive to replace the relay switches that govern the roof retraction? Help, it is starting to get sunny and hot here in Missouri.