Be carefull We do this every day with no damage. Just take off the black clip holding the window slide jaw into the track. Then slide the window up and tape it at the top. Take out the bolts holding in the old part and replace it. You can't fix them that I know of.
We carry them in the partsshop.
1981 280GE SWB
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM