One set contains one pipe and two star rings. 

Repair kits for Mercedes-Benz folding mirrors for sale. Suitable for installation on all models, which mirrors are shown in the picture 2009- . The factory itself does not offer the possibility of repair, only the whole frame can be bought from the dealer. The main problem that arises is that the mirrors flip over the end position, cleaning,lubricating the stick (shown in the picture), can make folding it up again as originally. The repair kit is required at the time of assembly.

https://m.youtube.com/watch?v=Dvh65ok2IVs