Noises from S'Roof are generally coming from your Pocketbook/Wallet.
These things are very easy to BREAK.
'Force it or parts of it at your peril !
GSXR's sunroof portion of his website:
http://www.w124performance.com/images/W124_sunroof/
PD's user friendly Service manual:
http://www.pauldrayton.com/uploadfiles/merc/Service/W124/Index/119index.html
Sunroof portion:
http://www.pauldrayton.com/uploadfiles/merc/Service/W124/Index/Groups/77Roofs.html
Mercedes Benz Club of Russia's Illustrated Electronic Parts Catalog:
http://www.detali.ru/cat/oem_mb1.asp?TP=1&F=124034&VIN=
(Updated whenever MB supersedes parts numbers)
The sliders in the picture below are Felt covered Rubber.They slide on
Stain-Less Steel Rails.When the Lube (Glietepaste,a special lubricant
that DOES NOT attract dust or dirt.) wears off: 1. The Sliders felt
coverings Go. 2. The motor clutch has to work harder. 3. Something
Expensive to R+R breaks(expensive because the labor is @ $100.00 p. hr.).