Thread: Dead battery and key won't open door!
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Old 05-17-2011, 07:28 PM
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onehundred80
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Default Re: Dead battery and key won't open door!
Originally Posted by MikeR
Being a curious George I went out to test mine... my hood is always up in the the garage(so the mice wont build a nest on the SC) so I pulled fuse #26. Damn the fob dosent work any more.... but the car does pick it up as I can hear it clicking trying to open the doors. Insert key and turn, driver door unlocks fine. It does not unlock the passenger door or hatch.
With the fuse in and using the key it does unlock everything....

So it seems that the OP does have another problem if his key will not unlock the door...
That's what I have been getting at, the lock tumbler must have a part on it that connects to the lock assembly, just like the ones in the house doors. If that part is missing or not connecting the key will turn and do nothing as his does now.
I have not studied this part so this is just my guess. I could not see MB designing a car with such an obvious fault, so that's why I checked my car.
Turning the key normally operates the central locking system, with no fuse #26 the system is inoperative.
 
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