Sunroof Operation ??

[Huw Powell]

> The patient is a new to me 1990 200.  The sunroof exhibits the
> following behavior. The sunroof will tilt open with the motor, but
> will only close manually.  The sunroof will not slide open with the
> motor but can be opened manually.  Once open, the motor (rather
> slowly)  will close the sunroof.  Is anyone familiar with these
> symptoms?  Is the problem most likely with the switch?, the relay?
> the motor? other?

I definitely vote for checking the switch first, since it appears that 
it only function in one direction ("forward", = "up").

Since you will be opening up the cover to get in there, you might as 
well look around, clean and lube things, while you're in there.

If the switch is good (you get 12v and ground in opposite polarities in 
each direction, I think), then the relay might be at fault.

-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/