everytime i use my key to open the back to put my groceries, it does not open, help. . .it sounds as if it is trying to open but it does not. i have to ask my son to open it from the inside, whew!!!
Sounds like the power tailgate is not operating. Take it to the dealer.
oh most probably the lock there is faulty. get it changed. http://mercedesbenzr.com/photo-gallery/
tailgate moter and accuator arm motor are cheap made and burn up quickly
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