rear door handle doesn't open door
Don't specically know about your car, but just had that problem on a 97 E420 that I bought...took the door panel off and looked at the routing of the cable...the black sleeve that the cable is surrounded by was not engaged inside the part located on the interior door panel itself. Once I pulled the sleeve into the correct routing it worked famously...I hope I am explaining it so you understand....
Does your door work when you disengage the cable from the door panel? It should open when you pull on the cable with it disconnected....to make sure it is not something inside the door where it "disappears".
Did you ever get the rear door fixed? I have the same problem. I would prefer not to start taking things apart before I know whether you were able to access that black box.
Thanks,
Brzeszczyszczykiewicz



