central locking not working on 230ce merc.

[bricklayer]

hope you all remember me i have an 1985 230ce pillarless coup and the central locking is still not working.

i have just took the panell off the pasenger door and cut back the polathien there are two yellow like air cables to an unit at the bottom left which then operates by the look at it the door opener.

everything looks ok started the engine and felt along the pipes and there dont seem to be any leeks.

as i onley have a booklet on the car does any of the fueses link to the centeral locking or are there any relays on the car i cant seem to find any.

its not a big problem with it not working but one which i would like to solve.

any help

please. re

 

[shayes]

I had a problem with a 230TE and I think in the end I put it down to a unit failure in one of the doors.(at the bottom) You won't necessarily hear it unless you've got all the panels off and sit inside whilst someone tries to lock the door. Oh, of course the car must have been started recently before you check.

There are plenty of cars being broken and I bought a full set of replacements for my SEL for not a great deal of money. When I think about it buying new parts from MB cost a fortune but this was pre-ebay so.....

Suggest you pick up one unit and move it around until you find the culprit. I beleive from memory they are interchangeable. Only hope it is not the boot unit as that can be a pig.

 

[television]

Is the vacuam pump running,nothing to do with engine running.

Malcolm

 

[Amphiscian]

123s don't have a vacuum pump.

 

[television]

123s don't have a vacuum pump.

Thank you for that

Is there a vacuam in the system.
http://www.detali.ru/cat/oem_mb2.as...+++717.401&CT=F&cat=318&SID=80&SGR=045&SGN=02


malcolm

 

[bricklayer]

to television, when i took the door panel off it was like the first picture you sent 2 tubes to the bottom unit.
i started the engine and checked for any leaks but could no find any in the door panel thinking of it when testing can the door be open or has it to be closed. is the centeral locking on any fues or relay system

best regards

roy

 

[Hibbo]

Alright Roy, just to confirm, this is a w123?

 

[bricklayer]

yes its an 1985 230ce pillarless coup an automatic and i persuim its a w123

 

[Hibbo]

yes its an 1985 230ce pillarless coup an automatic and i persuim its a w123

'85 was the changeover year from w123 from w124. Can you post a picture of your car (or one that looks the same) or look at the first three numbers of your VIN.

 

[Amphiscian]

Alright Roy, just to confirm, this is a w123?

Good question, unsleeping Hibbo. I made an assumption through personal prejudice earlier. Please continue to watch over us!

 

[bricklayer]

yes vin no, 1232432a, is the centeral locking to a fues or a relay then if not i can look elsewear.

roy

 

[Hibbo]

The central locking on w123s is all done via vacuum. The fault is almost certainly due to a vacuum leak somewhere (it doesn't have to be in the central locking system - headlight adjusters are a common suspect).

As Amph has said, there is no vacuum pump on the w123, vacuum is taken straight from the inlet manifold (diesels have an engine drive vac pump). It is stored in a vacuum 'tank' under the parcel shelf. I must have one of the few W123s with fully working CL, even after it's been stood for ages!

Splash out on a vacuum gauge, I got mine off t'interweb for about a tenner, they are invaluable if you've got an older Merc (Merc were vacuum bonkers!)

Have you tried operating the central locking whilst the car's running?

If you can remove the pipes to each lock from where they tee off, you can easily actuate the locks just by sucking gently on the tubes.

It could also be that the master lock in the driver's door is shot and not actuating the system.

 

[bricklayer]

the first 3 numbers on the vin are 123, so does that make it w123, does the central locking tie in with any fuses or is there an relay.

best regards

royi

 

[bricklayer]

the headlamps work on the vacuum does any other things work as well.

the system worked ok for the last 18 months.


best regards

roy

 

[bricklayer]

yes tried the car running and locked doors and the central locking works perfect when running when engine off it does not.

where from hear.

 

[Hibbo]

The system is working perfectly when it has a constant supply of vacuum, but no vacuum is being stored when the engine is off.
This means that there is a leak *somewhere* in the vacuum system.

You'll need to get at the vacuum pipes all over the car (under the carpet too) and black certain runs off one at a time, ideally where the pipes tee off.

Sorry I can't be more specific, but if you google "w123 vacuum layout" or something similar you should find some more gen.

Let us know how you get on

 

[bricklayer]

many thanks hibbo will do as you sugested