I just had this problem and the valet key would not open the trunk. I checked this forum but ultimately called MB Roadside to get the trunk open. The approach he used was to use a jumper cable from another vehicle to the alternator. On my 2002 model the alternator is on the left hand side of the engine (looking at the engine from the front of the car). All he needed to do was to remove the front piece of an air supply hose (~3" diamerter) to gain easy access to the alternator post. He attached the positive cable to the post and the negatve cable to the engine (any thing metal & non-electrical will work). He let the battery charge for about 5 minutes, started the car, and used the fob key to open the trunk.
The best bet if your car is covered by MB Roadside is to just call them - it takes about 20 minutes.
Hope this helps!
I still have the mechanical lock issue. The MB Roadside person told me how to go about getting to the lock and potentially determining what the issue was.
The best bet if your car is covered by MB Roadside is to just call them - it takes about 20 minutes.
Hope this helps!
I still have the mechanical lock issue. The MB Roadside person told me how to go about getting to the lock and potentially determining what the issue was.