Windows gasket lubricant
 

The passenger window squeaks and sings when I put it down or up. It there a special lub for that or should I just use WD-40?

I hear "Gummi Pfledge" from a BMW dealer is the best for window and convertible top squeaks. No personal experience but lots of testimonials on PPBB

..
 

I have the same problem....a little sound when a open or close the window.

Where i could to buy that product??
Thanks..

"Gummi Pfledge"

from


BMW dealer

Yup. Gummi Pfledge is made to keep the rubber from freezing during winter but will also quiet things down. I still have some left from my M3 days so a tube will go a long ways.

There's another trick where you can use talcum powder. I've never tried talcum myself but it might be better than getting the windows "greasy" with the Gummi Pfledge.