Following steps are for 2005 C240,
Mercedes: you interior materials suck !
Step 1: Oh No !!!
I fixed my driver side grab 2 years ago without documenting anything. When the passenger side broke also, Laws of Symmetry dictates that that I post the steps here ...
Step 2: Too Lazy ...
Yes, all the Benz forum said to replace it... But I'm way too cheap & lazy to order the $40 parts & remove the door panel.
My next best thing was super glue.You'll need:
1- Dab of Epoxy glue
2- Some mixer/spreader and holding thingie
3- Flat head screw driver
4- Anything stiff item that's around 10" high
Step 3: Cover Removal
Just take a flathead & carefully pry off the. Grab bar cover. Work around the edges & be very gentle.
Step 4: Create More Gluing Surface
The cover piece that had the broken end is useless now, I notched off a piece of the same diameter so there will be more gluing area.
Step 5: Spread & Secure
I mixed squeal parts of the epoxy and spread along the damaged area. Then overlay my patch thingie for best coverage.
Use the glue sparingly & swipe off any excess.
Step 6: Secure & Wait
My breakage needed a push up & in to secure it in place. Be creative ...
Wait overnight, pop the cover back & your set till the next one falls off ....