W126 Door Lock Problems

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W126 door lock problems.

I am having another door lock issue. This makes it more challenging to troubleshoot. The w126 was the first mercedes to use a separate electric pump to provide vacuum to the door lock system. W126 vacuum door locks on the 1981 to 1991 380se 380sel 300sd 500sel 300sdl 420sel 300se 300sel 560sel 350sd and 350sdl are prone to problems.

For starters the systems are getting old and with age comes common leaks and failed actuators. Make sure the driver s side door is closed and turn the key to the lock position. W126 80 090 checking function of central locking system page 1750 jpg 65 7 kb views. If you let the pump run on like that every single time it locks the little motor in the vacuum pump will definitely burn out.

Read honest and unbiased product reviews from our users. The drivers side door only locks and unlocks the driver door. Wait about 5 minutes to see if the lock side of the system holds. When the doors lock the pump runs for a few seconds as it should.

As far as the w126 cars go the only major difference besides geni and gen ii are the different engines and as far as i ve found all the body parts are the same. 1 273 w126 80 090 checking function of central locking system page 1751 jpg. Any ideas where to start troubleshooting this problem. All the doors on the car should lock.

This means there is a pressure leak in one of the actuators. Pull a vacuum of 10 to 15hg. Once that is determined you will need to find the source of possible leaks in the hoses and vacuum lock actuators. The first thing is to make sure the pump is working and producing vaccum.

My new latch.