The problem is with the lock segment itself. The unit is made with some cheap type of alloy and the tip that goes into the bracket that locks the door is 99% of the time broken. I got a replacement lock from the junk yard and jury-rigged mine. You may have to do the same. Good luck!!
doors locks & trunk lock not working
there isn't one. it locks with the door locks. unlocks when doors are unlocked. doesn't pop open you do it by pushing in the door on the front side.
There is a fuse blown I think is f31
There is no latch. The fuel door locks/unlocks with the doors.
go back to the dealer
On my 1992 190E I can lock the trunk with any of the keyed locks. If you lock the doors, the trunk locks and if you lock the trunk, the doors lock. In other words all the keyed locks are electrically interconnected. In reality the locks are not electrically interconnected. There is a pump in the right side wheel well of the trunk, it uses vacuum to lock all the locks and pressure to unlock them. Although the pump is powered electrically, the locks are not.
I removed the 75 amp fuse in the trunk box of my 93 400sel, left it out for 5 mins and put it back, all vac locks work again
The gas cover is sometimes locked when the trunk locks. Therefore, unlock the trunk and the gas cover will be unlocked..
from what im told the locks on the car are vacuum lines, perhaps your vacuum isn't working or the lines have popped off.
It is interesting that you make that observation. I am not sure all owners would agree with you.
does it have a child proof lock syetem that locks from drivers door?
I replaced the drivers door switch on mine and it took care of the problem