I've recently got a 1984 230 TE. When I got it the central locking mainly worked but was a bit lazy on the passenger side front door. Now it doesn't work at all.

Haynes don't do a manual for this model only the deisels or 6 cylinder petrol, but I think I'll get one of them to cover the rest of the car.

So far - as it's easy to access I've tried putting a pipe on the petrol cap lock and sucking, that works. The tailgate trim is off following a broken window so I've done the same on the lock and unlock side, that works too.

Next I took off the trim on the front passenger side and the sucking pipe test works that lock OK. Also the vacuum plunger works both ways when disconeceted.

I was planning to work around the rest of the doors but the other half has taken the car out.

I take it there is a resevoir somewhere, but where is it?

If all the lock diaphrams seem OK how do I test if there is enough vacuum.

How does the switching actually work?

What else should I look for?

Anyone have a schemetic?

Also I've upset the threaded adjustment on the front door, how far up or down should it be?

Sorry this is so long for my first post on this forum!

 

I purchased a service manual from www.manualsunlimited.com It was $23 & is VERY thorough. That's about all I can offer...

 

first check for vacuum leak from vacuum lines.

a vacuum element or connection must be leaking.

 

Can you tell me if your 1984 Mercedes has doors which automatically lock, unlock and/or relock? If so, when do they do so? For example, is it at a certain number of miles per hour or when you place it into a certain gear?

I'd be very grateful for any info you can give me.

Thanks,

jacksquat