This instruction will show you guide how to install outside mirror glass and cover trim for Mercedes-Benz E-Class W212. The cover we used fits for W176 W246 W204 W212 W221.
Procedures:
Remove mirror glass
Unclip connectors
Lift bottom cover
Lift catch hook and remove trim upwards
Install new double-side tape
Use torx T10
Install new cover and put the mirror back in
More cases about W212, please refer to Benz Trouble Repair.