my 126 keeps locking me out argh!!! - PeachParts Mercedes-Benz Forum

buffa98 · #1 07-07-2009, 05:20 PM

disconnect the vacum pump in the trunk. once you get it open. Pull the spare, on the passenger side there is a foam cover that covers your pump. I had to unplug mine for differnet reasons. The only thing is NONE of the auto locks will work. You will have to manually lock and unlock all door etc

Phil · #2 07-07-2009, 05:32 PM

Im not sure of the year of your car but the only way the drivers door could lock like that is if there is something attached to the key lock inside the door that is pulling the lock knob down. There is no pneumatic connection to the lock unit unless some one added something. I even tried adding a vac/pressure line to the drivers door lock on my car and then it would work if I activated the pump in the trunk (I did this as a test for a remote door lock but it turned out to be easier to add a solenoid control to the lock knob in the drivers door).
I would take the door panel off and look up at the shaft going from the knob to the key lock to see if anything was added. Even if the pump ran from a short it wouldn't lock the drivers door.

polarisrmk · #3 07-07-2009, 05:35 PM

Quote:

Originally Posted by Phil

Im not sure of the year of your car but the only way the drivers door could lock like that is if there is something attached to the key lock inside the door that is pulling the lock knob down. There is no pneumatic connection to the lock unit unless some one added something. I even tried adding a vac/pressure line to the drivers door lock on my car and then it would work if I activated the pump in the trunk (I did this as a test for a remote door lock but it turned out to be easier to add a solenoid control to the lock knob in the drivers door).
I would take the door panel off and look up at the shaft going from the knob to the key lock to see if anything was added. Even if the pump ran from a short it wouldn't lock the drivers door.

People keep saying this in all the threads but my 1985 300sd has a vacuum line to the driver door that will lock it from either the trunk or the passanger front door. also locks when the car locks by itself. There is nothing pulling down on the lock nor is there any other malfunction in the system its just a stupid design. wtf would you put auto locking doors on a car than can lock the keys in the ignition?!?!?!?!?

Phil · #4 07-07-2009, 05:43 PM

ok

polarisrmk · #5 07-07-2009, 07:45 PM

Quote:

Originally Posted by Phil

Knowing the year now makes a big difference. See if this diagram helps, it looks like they added a lot of stuff in 85. There is even a connection to the orthopedic seats.

these do help ... on another topic... where is the button located for orthopedic seats if i have them .... the driver seat controls have memory seats which i have not played with yet and another button that i am not sure what its for or if it even does anything.

toomany MBZ · #6 07-07-2009, 08:23 PM

In the manual there is no distinction except for the location of the pump, these pics are from the manual with the trunk mounted version.
You may have a leak, but otherwise as has bee mentioned, an aftermarket security thing.
Four more pics to follow.

toomany MBZ · #7 07-07-2009, 08:27 PM

This is the test procedure.
Good luck.

polarisrmk · #8 07-07-2009, 05:32 PM

Quote:

Originally Posted by buffa98

disconnect the vacum pump in the trunk. once you get it open. Pull the spare, on the passenger side there is a foam cover that covers your pump. I had to unplug mine for differnet reasons. The only thing is NONE of the auto locks will work. You will have to manually lock and unlock all door etc

Not quite the solution i am looking for. And doesn't solve the problem at hand.... I am stuck ... may have to call a damn locksmith ugh