[s-cars] Manually close sunroof process

[weski at verizon.net]

My sunroof has been acting up recently (it would pop-up arbitrarily by 
itself and then close itself a minute later).  This has been ongoing for 
several years but did it only once a month or so that it didn't bother 
me enough to look into it.  A few weeks ago, it seemed to lose home 
position - I went to close it and it went past closed to the pop-up 
position even though the dial was in the closed position.  To get the 
sunroof to stay closed I would turn it to slide it open but turn off the 
key and open the door right as it was in the closed position.

Today, when I turned it to close it stopped a couple inches from full 
close.  If I turn the dial to pop-up, it did nothing - it thought it was 
already in pop-up.  It's supposed to rain tonight so I pulled the panel 
open, pried the red cap off, and cranked the roof closed.

My question is - how do you replace the red cap?  Without the red cap, 
the motor runs but doesn't engage the sunroof gears so I can't really 
test to know if it is working correctly now or not. I do know that I can 
drive like this without worry of getting wet inside but I'll want to get 
this figured out so I can enjoy the nice summer days.

Let me know if there is a secret to replacing this red cap.  I tried 
using my rubber mallet but didn't want to hammer it too hard for fear of 
breaking something.

TIA,

Paul Dooley
95 S6 237k daily driver