Mercedes W140 cental locking pump Fix - MBClub UK

Mercedes cozy · 08-08-2007, 10:43 AM

All,

I had a guy at work today and he was have problems with his cental locking pump for his W140 S600 coupe V12.

A new one for his car costs around £1000 inc VAT

He had it repaired and only lasted a week, cost him £150.
Got his money back now.

Right I have managed to fix it for him and saved him loads of money.
All working fine now. Cental locking, Orthopedic seats, bootlid lip etc.

So if anyone else has a problem, I will be happy to assist.

As I have a few bits and pieces to repair them.

Georgeabc · 28-09-2007, 05:22 PM

The Central lockign pump on my Mercedes has stopped working. I have a Mercedes S320 1998. The part no. is 1408003248. Can you repair it?

**jaymanek** · 28-09-2007, 05:31 PM

Cozy... how long is the ortho pump supposed to run for... i have checked my system for leaks but after the initial pump stops (which runs for a minute or two) the seats deflate within a few minutes...

television · 28-09-2007, 05:41 PM

Quote:

Originally Posted by jaymanek

Cozy... how long is the ortho pump supposed to run for... i have checked my system for leaks but after the initial pump stops (which runs for a minute or two) the seats deflate within a few minutes...

Jay, this will not be the pump.

There are several parts in the system, there are one way valves on all of the seat function plus there is the reservoir tank for the seats as well. these pumps can only run for 18 sec as they a vacuum switch and an electronic switch that cuts in should you have a leak in the system.

If you are going to have a go your self I can guide you through it having taken all of my seats apart I know how they work

**jaymanek** · 28-09-2007, 05:43 PM

yes i checked the tank in the boot, that was the initial problem, someone had disconnected it at some point... have reconnected and blew into the pipe, held my thumb over it for a few minutes.. the pressure was holding there.. I have also changed all the pipes in the seats...

cant see where else there could be a leak?

where are the one way valves as apart from the one on the pump and the controllers themselves i dont see them? also i get a hissing fromt he controllers while the pump is running... logically this seems normal as there would be excess pressure to release when the pump is running...

television · 28-09-2007, 06:07 PM

The control valves are built into the backs of the seats on mine. they have memories and when you start the car the blow up to the last used settings.

Do you have one of the little air brush compressors

**jaymanek** · 28-09-2007, 06:09 PM

yes the ortho seats are much more complicated on later models, this is basically a control valve, some pipes, a tank and the pump... yet its got me... however this weekend i will be testing every single vac line for a leak.

an air brush compressor?

television · 28-09-2007, 07:05 PM

Quote:

Originally Posted by jaymanek

yes the ortho seats are much more complicated on later models, this is basically a control valve, some pipes, a tank and the pump... yet its got me... however this weekend i will be testing every single vac line for a leak.

an air brush compressor?

You cant do it without a small compressor as you will burn the car pump out if you keep trying to run it.

This is an air brush compressor, you can borrow it if you wish and pay the postage. I made the one way valve from a spray cleaner bottle

**jaymanek** · 28-09-2007, 07:14 PM

who shrunk your car?

thanks for the offer but i want to try and crack it this weekend as its bugging me... i think i will just blow hard and use my tongue as the one way valve, i only want to test for leaks...

television · 28-09-2007, 07:19 PM

Quote:

Originally Posted by jaymanek

who shrunk your car?

thanks for the offer but i want to try and crack it this weekend as its bugging me... i think i will just blow hard and use my tongue as the one way valve, i only want to test for leaks...

OK, most leaks stem from the pipes that go up into the seat where the pipes come through the floor. they get creased as the seat moves.

the car is full size, it is that the compressor is on the large side

**jaymanek** · 28-09-2007, 07:24 PM

good job i didnt ask you to post it then!

thanks i will look into it and report back... cheers

bobski · 17-03-2008, 02:20 PM

i have big problem with air pump, pack up due to water from heater matrix? burnt terminals connecting to pump as well,can you help?

television · 17-03-2008, 02:49 PM

Hello Bobski I do not see how water in heater box will burn out Vacuum pump motor.

Can you put a picture up please

alfie1255 · 22-07-2008, 11:30 PM

i have a S280 '96' with the central locking not working. ca u fix the unit?

alfie1255 · 22-07-2008, 11:31 PM

[quote=alfie1255;600022]i have a S280 '96' with the central locking not working. can u fix the unit under the rear seat?

08-08-2007, 10:43 AM	#1
Mercedes cozy Hardcore MB Enthusiast Join Date: Aug 2006 Location: LONDON (Near Heathrow Airport) Car: Mercedes ML 320 CDI W164 KEYLESS GO / (NOW WITH STAR) Posts: 862	Mercedes W140 cental locking pump Fix All, I had a guy at work today and he was have problems with his cental locking pump for his W140 S600 coupe V12. A new one for his car costs around £1000 inc VAT He had it repaired and only lasted a week, cost him £150. Got his money back now. Right I have managed to fix it for him and saved him loads of money. All working fine now. Cental locking, Orthopedic seats, bootlid lip etc. So if anyone else has a problem, I will be happy to assist. As I have a few bits and pieces to repair them.

28-09-2007, 05:22 PM	#2
Georgeabc New Member Join Date: Sep 2007 Posts: 1	I need your help The Central lockign pump on my Mercedes has stopped working. I have a Mercedes S320 1998. The part no. is 1408003248. Can you repair it?

17-03-2008, 02:20 PM	#12
bobski New Member Join Date: Mar 2008 Posts: 1	w140 c/locking air pump 1997 i have big problem with air pump, pack up due to water from heater matrix? burnt terminals connecting to pump as well,can you help?

28-09-2007, 05:31 PM	#3
jaymanek Authorised Forum Sponsor Join Date: Nov 2002 Location: Nuneaton Warwickshire Car: Lots of Mercedes! Posts: 14,495	Cozy... how long is the ortho pump supposed to run for... i have checked my system for leaks but after the initial pump stops (which runs for a minute or two) the seats deflate within a few minutes...

28-09-2007, 05:43 PM	#5
jaymanek Authorised Forum Sponsor Join Date: Nov 2002 Location: Nuneaton Warwickshire Car: Lots of Mercedes! Posts: 14,495	yes i checked the tank in the boot, that was the initial problem, someone had disconnected it at some point... have reconnected and blew into the pipe, held my thumb over it for a few minutes.. the pressure was holding there.. I have also changed all the pipes in the seats... cant see where else there could be a leak? where are the one way valves as apart from the one on the pump and the controllers themselves i dont see them? also i get a hissing fromt he controllers while the pump is running... logically this seems normal as there would be excess pressure to release when the pump is running...

28-09-2007, 06:07 PM	#6
television Banned Join Date: Oct 2006 Location: Dorset on South Coast Car: R230 SL500 Posts: 12,271	The control valves are built into the backs of the seats on mine. they have memories and when you start the car the blow up to the last used settings. Do you have one of the little air brush compressors

28-09-2007, 06:09 PM	#7
jaymanek Authorised Forum Sponsor Join Date: Nov 2002 Location: Nuneaton Warwickshire Car: Lots of Mercedes! Posts: 14,495	yes the ortho seats are much more complicated on later models, this is basically a control valve, some pipes, a tank and the pump... yet its got me... however this weekend i will be testing every single vac line for a leak. an air brush compressor?

28-09-2007, 07:14 PM	#9
jaymanek Authorised Forum Sponsor Join Date: Nov 2002 Location: Nuneaton Warwickshire Car: Lots of Mercedes! Posts: 14,495	who shrunk your car? thanks for the offer but i want to try and crack it this weekend as its bugging me... i think i will just blow hard and use my tongue as the one way valve, i only want to test for leaks...

28-09-2007, 07:24 PM	#11
jaymanek Authorised Forum Sponsor Join Date: Nov 2002 Location: Nuneaton Warwickshire Car: Lots of Mercedes! Posts: 14,495	good job i didnt ask you to post it then! thanks i will look into it and report back... cheers

17-03-2008, 02:49 PM	#13
television Banned Join Date: Oct 2006 Location: Dorset on South Coast Car: R230 SL500 Posts: 12,271	Hello Bobski I do not see how water in heater box will burn out Vacuum pump motor. Can you put a picture up please

22-07-2008, 11:30 PM	#14
alfie1255 New Member Join Date: Jul 2008 Posts: 2	i have a S280 '96' with the central locking not working. ca u fix the unit?

22-07-2008, 11:31 PM	#15
alfie1255 New Member Join Date: Jul 2008 Posts: 2	[quote=alfie1255;600022]i have a S280 '96' with the central locking not working. can u fix the unit under the rear seat?

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