The roof window trim had seen beter days. On both sides, the “curtains” were torn, which is something that annoyed me very much as the CLS is a luxury car.

Bought 2 new trim pieces from Mercedes, they were quite easy to replace. Start from the outside of the car with the window tilted. You should then be able to lift out the trim pieces and then continue from the inside. On the front of the roof window, a hard plastic piece keeps the trimpieces in place with a small notch.

Looks way better after replacing it!

Partnrs: 2157801540 / A2157801540
Partnrs: 2157801640 / A2157801640

New (top) vs old & torn (bottom)
End result!