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Mercedes V280 Ambiente 1999
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Thanks Glen. That all makes sense. However, as the solenoids and the compressor were replaced by the dealer in 2010 I feel it is unlikely to be them (visually they appear very clean and new looking), and as you rightly say the compressor is on a different circuit anyway. As soon as it stops raining (as I said, we are in Scotland) I'll have another look for a chafing wire under there - you never know.

Do you by any chance know where the "relay" (that the fuse which is blowing protects) is located, because that might also be a good place to look for a short circuit?

Do you have a view on the dashboard switch solution suggested by the dealer? Based on reading all the suspension posts here it seems extraordinarily unlikely to me.

Steve

PS: it is routine for our annual holiday in Scotland to involve at least one trip to the MB dealership, one trip to A&E, and one trip to the dentist, so this is all part of the vacation experience. Sadly.
 

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Mercedes V280 Ambiente 1999
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So here I am back from the dealer. It will come as no surprise to anyone who has read the rest of this thread, or any of the others relating to air suspension, to learn that there was nothing wrong with the switch on the dashboard. They asked if I would authorise another 2 hours labour to investigate further, and I politely declined, having lost all confidence. I asked if they would at least try and pump the system back up so it was driveable, and it took another hour for the technician to figure out how to do this. Have ordered the emergency manual pump thingy from V Klasse and am hoping it arrives before the weekend. Then at least we'll be able to get home. All the key suspension components (compressor, solenoids, relay and control unit) were replaced under warranty in March this year, so provided I can get it back home it's off to the dealer again for more warranty work. It will be an interesting journey . . . . .
 

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Mercedes V280 Ambiente 1999
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19 Posts
Two contingency solutions for the journey home

Have managed to pump up the suspension by connecting the compressor direct to the battery using bits of cable purchased from Halfords (the compressor is new - replaced under warranty in March). It did involve groveling about on the wet ground (we are still in Scotland), which was not much fun, but successful nevertheless.

Also the emergency air line solution which I ordered from V Klasse on Sunday evening, arrived from Germany last night, which I thought was pretty efficient. Have to figure out how to fit it now, but it looks like we will have a couple of contingency solutions for the journey home on Sunday.

Have read this thread through several times now and couldn't have done this without it, so my very grateful thanks to everyone who has contributed to the collective knowledge.http://www.benzworld.org/forums/images/smilies/bowdown.gif

Thanks

Steve
 

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Hello and bravo to everyone on this thread. I'm Bill from Greece and I own a V230 with air suspension.
Here is my story
Lately, every morning the car was low. As the time passed the thing got worse as a result getting down in just a few hours. It also takes several minute to get the rear up. I knew something was wrong but my non authorised mb mechanic didn't know anything about air suspension. I went to two authorised mb garages and they didn't even looked at it. They said "ok it is typical, we will switch to coil springs". Of course I didn't accept that and it is out of question.
The bad thing here in Greece is that the V class is very rare and the ones with air suspension are really few. So experience in air suspension is zero...
So as the thing was getting worse and worse it came to the worst state. Yesterday on my way to Patra 200 klm from Athens my right suspension airbag exploded!!! So now the car sit down for good. So do you know the part number I need to order? Is there any after market airbag?
Thank all of you in advance.

PS: sorry for my bad english
 

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vito 220 cdi
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Hi, still in limbo at the moment :/ It's still with a guy who's going to try and find the fault before making a move to springs. Still got fingers crossed for a fix rather than a change :)
Will let you know when I have some news!

Anton
Hi AntzV280 im new to this site. ive read every thread. i too have a problem with my suspension, it has dropped twice in the last month. but if i leave it 4 to 6 hours. it lifts back up again. when it drops, the compresser is running flat out. but the van doesn't lift up. im not sure if its a wiring ploblem or some thing else. all i do know, i can hear the compresser running flat out both times its dropped. the rest of the time its fine. i see from your profile your in the bristol area. i to am from bristol. just wondering if you got yours fixed. and were you took it to get it fixed.
 

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vito 220 cdi
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hi guy's back a agian. im in need of your help. suspension gone down on the van again, and wont go back up. the lights on on dash and the compressor is running flat out.
iv'e read all the posts. and thought i would have ago at my suspension today.
any way, ive just removed the comperssor and solenoids, checked the wiring which all seems ok.
at first when the compressor first starts up, air starts to come out of the left solenoid. but not the right. but not at any great presser. hardly any in fact.
then moments later, it starts coming out the exhaust.
thats it in a nut shell. can any one give me advise. is it the compressor, or are the solenoids shot.

cheers guy's neil
 

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V280
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35 Posts
Hi all
Thanks firstly for the great thread it helped me change my solenoids (transverse shut-off valve) 18 months ago. Some of the stories are heart wrenching and you have to laugh with identification. This time around after a MOT she dropped to her knee on one side. (Maybe they damaged the system rattling her around on the lift having not turned off the system.) I managed to "reset" the system and pumped up the back twice, it would stay up for a couple of days but finally she gave up the ghost. Long story short…compressor off and inspected, seemed like a stuck piston. I melted a power adapter testing it (12 volts but only 3 amps) and had to cut the compressor open to look at the motor so I have decided to put in a new (stronger) compressor which usually goes on the S class etc. (Wabco 415 403 303 0) It’s coming from Germany and takes 10 days. German guys on their V class forum have put this one in instead and it has worked great they say, even pumps up quicker.

Wabco Kompressor 4154033030 - 415 403 303 0

V-Club Forum

I have tested the two solenoid valves and they are clicking and I managed to try and pump air from a bike pump and they seem to be working as they should. However, does anybody remember what the resistance should be like in terms of ohms? I need to know since I am going to put these back in.
There is no power coming to the wires going to the compressor although there is power to the solenoids etc. Is this because I have the read button of death on my dash and the controller module is stopping the power to the compressor? How do I know that the system will recognise a good compressor when it is already turned off due to the bad one? Will pressing the dash button reset this? It didn’t make a difference to trying to get power to the dead wires when I taped down the button and checked the compressorfeed wires with a millimetre.
If the van had dropped down on one side only—perhaps a slight leak since it had actually been dropping more on one side that the other for years—and the compressor was struggling—but no fuse gone—is this the reason why the system failed do you think?
Could the relay be damaged?
Can I test the new compressor with direct wires from my battery?
I would appreciate any help. Especially for a solenoid check and the issue about no power to the compressor.
 

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V280
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Hello all

I have now installed the Wabco and I am happy to be driving again. I had to cut a space for it in the metal holder for the old compressor. The 4mm opening from the compressor to the 5mm opening in the Magnetventil was difficult. I just had to use a blade and sandpaper to make the 5mm tubing fit the smaller opening in the compressor and I glued it with epoxy on the outside too. Couldn't get a steady resistance reading the cross valves, but I just thought that that was the way it went with these valves.

Seems to be working fine except that it raises the back too high? It drops a lot overnight (my old one did not drop at all) then goes straight up to the high position very quickly when you open the door. I did not know which wires were for negative and positive and when I tested it before I put it on the compressor worked no matter what combination of wire colours I used. In the main wires to the compressor motor I connected the brown or dark red to the same colour on the car side. The smaller wires I just had to guess. I have installed a button in the back to raise and lower the back (I saw how Tim L, done it here on this German link.

Wish I could find out why it drops over night thought. There are no leaks that I can see even with spraying bubbles under there. And why it is riding high is anybody's guess? So come on and guess!

V-Club Forum


Thanks Hugh
 

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Rear suspension woe's

Hi guys,

I've got a 2004 Viano with a serious judder from the rear when I go over any kind of bump in the road. The suspension self levelling doesn't seem to work (buttons in the back do nothing, the light on the dash doesn't come on and there is no compressor noise).

A merc inde has said that the air suspension controller unit needs to be replaced. Two questions:
1. They are expensive so is there anyway I can test this for sure?
2. Where can I find the controller unit itself in the vehicle to get a part number and look up the part?

Cheers
 

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1998 V230 Ambiente
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58 Posts
Hi guys,

I've got a 2004 Viano with a serious judder from the rear when I go over any kind of bump in the road. The suspension self levelling doesn't seem to work (buttons in the back do nothing, the light on the dash doesn't come on and there is no compressor noise).

A merc inde has said that the air suspension controller unit needs to be replaced. Two questions:
1. They are expensive so is there anyway I can test this for sure?
2. Where can I find the controller unit itself in the vehicle to get a part number and look up the part?

Cheers
Not sure about testing it but for question 2, on my 1998 V230, the controller is inside the car, behind the large trim panel that is above the right hand side read wheel. Half a dozen screws and the panel is off, controller is then easy to see.

Had loads of trouble with my air suspension, none of it was the controller though, usually fuse, solenoid valves or the compressor itslef. Eventually gave up and fitted coil springs, never regretted it yet, wish I'd done it earlier.


Rgds

Chris
 

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1998 E320 4MATIC Wagon
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38 Posts
I hate's it!

Replaced pump and O-rings in solenoid valve. Would not go back down. Tested pump, valve and dump valve, checks good. Reset ECU, pumped up but the light stays on. I HATES IT!
 

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air suspension

hi all

new to this site but i'll add my bit

only just got my v220 cdi and it had an after market compressor fitted, it was wired up poorly but sort of worked, the back would go up unevenly and i couldn't get it down, after lots of reading on here and a little research i clambered under the car disconnected all the pipes from the compressor ripped the valves out put the pipes back without the valves, also fitted a new valve to dump the air and a pressure gauge under the dash, wired the pump to the inflate switch on the dash and the new valve to a new switch on the dash so now i can pump up or drop down when ever i want, don't need on-bored computer to tell me how i want it set, being an electric wheelchair user it's great for loading and unloading,
i'd be happy to explain how to do this if anyone is interested
Mick
 

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1998 E320 4MATIC Wagon
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38 Posts
You, my friend, are a GENIUS!
 

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1998 E320 4MATIC Wagon
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Well after 16 months of messing around with this and changing the pump, rebuiling the old switching valve and then replacing it, testing all the wires from the pump to the controller under the right rear interior panel. I finally took it to the deal hear in Moulins, France. It took them 3 weeks to get it done, and replaced the left levaling control sensor to find out it was a corroded 20 cm section of wire that connects to that sensor, cost 5 euro to replace. Final cost was almost 700 euro. Not incuding the pump and valve from V-Klasse. Well its working now and I am holding my breath every day I go out to start it up. Any one want to buy a swtching valve? 80 euro plus shipping.
 

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Mercedes Benz v class
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Air suspension

"Then, find the plug that operates the motor, get the compressor"


Firstly thank you for the info which is very much help full. :bowdown: I have a Mercedes Benz v 230 a 1998 model and am facing a challenge with my vehicle's ground clearance that is so low. Anyways i read your article and I was hoping if you could tell me where I could find the motor plug that operated the motor to get the compressor running as you highlighted in your post. Please assist me. Thank you in advance.
 

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I've just read this from start to finish, very informative and good on all who have contributed.

Regarding the solenoid coils, they are available from any pneumatic control specialist, at a fraction of the cost of Merc ones, as are the 5mm pipe fittings, plastic tubing etc etc.

Most pneumatic controls are low voltage, either 12V or 24V, and there is bog all in the actual valve part that can't be cleaned up and oiled to make them function as new.

The upside of this is, by retaining the original valves, it should stop the cycling and noise that some of you have found when fitting aftermarket parts ;)

HTH Dave
 
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