[W126 Coupe] Door locks

[Dick Spellman]

Hi Simon,

Your description of pass door lock operating the other devices from the 
pump in the trunk to pass door suggests there is no leak in the vacuum 
system and that pump is working just fine..

Circuit goes as follows:  pump  -  boot latch  -  gas flap  -  pass door 
- driver's door.  Any leak and no latching in central locking will 
occur.   So, you have no leak.

It could well be the wired circuit at the drivers door has an open.  I'd 
start with testig the cable that plugs into the door handle circuit as 
it may have developed an open in the door hinge area or right at the 
door handle itself.  You will need to remove door handle to access and 
replace or swap.   No need to open the interior panel.

The 83 used two separate round booted cable entries to the door at the 
hinge area.  Later models used a single rectangular boot.

Regards,

Dick

Simon Rock wrote:

>

> Hi,

>

> I have a 1983 500SEC (which I love). The door key can unlock and lock 

> the passenger door and the boot. But when I turn it in the drivers 

> door lock, it turns but doesn't  do anything. I have tried moving the 

> little look stick with some pliers, but it will not move.

>

> Should my car have central locking?

>

> What should I check first? What are the most likely problems with 

> these locks?

>

>  

>

> Thanks for your help

>

> Simon Rock

>

>  

>

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