2007 s550 - had the car repaired after vandalism. When I got it back the drivers's door lock button remains up about 1/2 inch even when locked. All other buttons are flush when locked. I then tried the emergency lock procedure described in the manual (leave both left side doors open, press central locking, close driver's door, and from rear, press button down (didn't help) and then I closed the rear door - the button remains up too. How do I get the buttons to stay down? I figure there has to be a trick, but body shop does not know. Thanks

SOURCE: 1995 Mercedes Benz S320

sounds like you have a wiring problem in the main lock switch in the driver side door or wires that run from there to the other doors. one of the wires in this system does not have a good enough connection to allow enough current to operate the locks. put another way, the wire itself is introducing unwanted resistance which reduces the current flow. the resistance could be a result of a poor connection at a junction or a section of wire which has corrosion or some other problem which diminishes flow. to find exactly where the problem lies will involve removing door inner panels and making voltage drop tests across connections. works something like this: i started out with 12v dc, i know this component should use 3.4 v (or whatever it is) but now i only have 4 v coming to this next component. so the wire is using some of the voltage. some drop in the wire is normal, but not very much. that is how i would troubleshoot it. you can just check the connections to power and ground, just look at things and make sure you don't see corrosion, wiggle connections and see if it makes something different happen, but you will still have to take the doors apart to do it. hope that helps

SOURCE: Door Lock Malfunctioning

power door lock solenoid may need replacement

SOURCE: the rear passenger right hand door does not open with remote

child safety locks or bent linkage ?

SOURCE: 2003 Mercedes E32O with a machine gun door lock

you have to replace door lock completely , there is small plastic gear on electric motor which moves locking mechanism and seems that gear is broken, but it is not available as separate part.

SOURCE: Hi, My cars central locking

Replace Fuse 27 in main fuse box located under the hood black box in far right corner. Then try reseting your battery. Make sure to follow these steps as follow. Unhook the - then + of the battery. Clean both the negative and postive of the battery. Next go under the hood far right and replace Fuse 27 which is 15 type fuse green in color. Wait 20 minutes for reset of the computer then attach the + and - cables back to the battery.