Mercedes air suspension dropping???
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- Опубліковано 5 жов 2024
- Mercedes Benz air suspension , known as Airmatic , dropping and you cant figure out why?
After replacing shocks, bags, valve block, it cant be the compressor right?
WRONG!
I devised this test after a recent car drove me insane. I HAVE to prove why something has failed, and this test is now added to my list of things to check on the air suspension. I hope this helps you!
Lou Palomino
I wont lie, the rear air bags still needed to be replaced due to extremely fine leaks through the bellows. But if you have a sticking or leaking relief valve it will stop pressure from being built and actually lower the car if the compressor comes on and valve block opens. So add this to your toolbox of diagnostic ideas when it comes to airmatic suspensions. Hope this helps!
Realy helpfull! Can you exchange the relief valve without exchanging the whole compressor? Thanks for all your content its really the best out here on YT
@@JB-hw8ce I think you can find the valve on ebay and amazon. 🤔
I ponder bags must be bad as on locked car valve block is shut and all bags isolated individually from the rest of system in theory 🙂
Great aproach to a quite common problem, had it on my landrover in the past, drove me crazy. Great info man !
Very good video just had the same problem with a ml550 but it drops in the front compressor went bad then valve block psi was stuck at 507 psi so changed that now it rises but once I take for a ride it drops again I’m thinking I might have a leak that I can’t see on the airbag itself. But thanks again for video helpful
Hi Lou, thank you for the video. My compressor on my W212 does the same. The pressure goes up to about 7.5bar and leaks away through the compressor to atmosphere once the compressor stops. I've replaced all the o-rings inside the compressor and it is still the same. You didn't end the video stating that changing the compressor fixed the air leak? It feels stupid to replace a $1000 component for a leak that could probably be fixed if you knew where to check. I'm still battling with mine. If I apply air pressure to the car compressor outlet, the pressure is lost through the compressor somehow and exits through the intake pipe, same as in your video.
Compressor fixed my leak through the check valve. We do not rebuild these we replace. So im not sure what o ring does what
Hi Lou, thanks for the video on airmatics! You really explained the whole system very well. I’m driving a C200 equipped with airmatics. Rare as it is, it started giving me problems which my mechanics and I couldn’t solve. I wished I come across your video earlier. I’ve changed out 2 front suspensions, air compressor and valve block. However, the FR and both rear suspensions could not lower. We deduced that it was the valve block that was the issue after all the checks on the parts such as compressor, air lines and suspensions. While waiting for the valve block to be delivered, we left the car for a few days. We noticed that the rear suspensions dropped all the way, while the fronts dropped a little. If you could help, give us some tips to what could be the problem? Many many thanks in advance.
Hello, well…… all of my tips are in my airmatic video my friend. I was very thorough in that video for a reason 😊.
All I can suggest is to rewatch the video in entirety. And pay attention to the leak part. There are very few items in the system. The only time I struggle is with very random issues. Like right now I have a S class that keeps blowing the fuse and burning compressors but never happens here in the shop. So this is a head scratcher for me at the moment. But as far as dropping suspension, its either the shock/air fittings/air line/valve block. Also you cannot have once side drop without affecting the others. The car has to move. So best I can say is do my measurements check I explain in beginning. If you end up needing my help further you can find me on instagrams messenger. I do charge for my time. Time is one luxury I dont have.
Haha! Thanks for the advice! Will rewatch the video again. Will get my mech to diagnose what could have caused the leak. Talking about fuse, I’ve blown an orange fuse twice, and it is this blown fuse has caused the FL suspension to drop. Still scratching my head what could have caused the drop as well… 😢😢😢
Bubble soap for finding leaks, just like AC? Water doesn't show anything, unless you put it underwater?
The solenoid manifold valve spool is not seating fully in either direction? If it's a single or dual solenoid setup, it's either not seated properly in neutral(solenoid not engaged} or not shifting fully when engaged?
When I install the new compressor I’m going to disassemble this one to check the internals to see whats actually happening.
what I don't understand is WHY only the rear dropped not all 4?
I think I pinned the comment, the issue ended up being rear bags. The valve block locks the air . And the compressor valve should also lock the air which it did not. But the fix was the rear bags they only showed a leak
After driving and getting the bags hot
These videos are very helpful Thankyou
I am currently in progress on another follow up. I have a car that will not lower because the valve on the compressor is stuck closed.
you do not say what is the fix. a new compressor or can the relief valve be replaced???
Another very helpful tip. Thank you. Can you do one about assessing mercedes shocks and struts with the airmatic. Will worn out shocks of airmatics operate like they do with coil springs?
Thanks! Unfortunately I don’t think the air portion ever lasts long enough for the hydraulic shock portion to fail 😂
@@MasterTechLou I believe you, the shocks do last. Aside from watching for fluid leaking from the shocks, and high miles, how else can we tell when it's time to replace it? I've had experience with coils, when they roll like a boat and bounce a few times over bumps; does worn shocks in airmatics behave differently?
@@RobertoMenguitoFrontierMedAlle you will get knocking noises before any excessive movements.
also when you set comfort or sport mode the knocking will change. other then that, I have never seen these behave like normal cars with back shocks.
@@MasterTechLou I get it. So we can't elicit that usual bounce test (like we do with coils, rocking or pressing down on each corner then release)? Thanks Lou!
Bonjour , l avant de ma mercedes classe r descend des que je coupe le moteur en quelques mininutes mais 1 jours sur 5 donc je ne pense pas que c est une fuites des boudins , c est possible que ca vienne de la soupape du compresseur ? J ai changer le vloc electrovanne mais aucune difference ....
Merci
Hey Lou, thanks for these videos. My 2014 E550 front two shocks are low in the mornings. Some days its fine, some days its low(slammed). It does have electrical connections on the front struts. When the car is low it given the "vehicle rising, do not drive" message. Once filled the car is okay to drive around.
After the car is raised, when I disconnect the inlet line from compressor that feeds valve block and zap strap it with a balloon, the car periodically lowers the cars and fills the balloon. I did not disconnect any batteries. Is the car self levelling once parked or does this mean faulty valve block as the ballon is periodically getting filled with the car off?
Leaking valve block. Car does not adjust level once off.
hello. i have 2008 MB R320 CDI. customer was completing about right rear side dropping down overnight. I checked a leak I found a leak in bag and replaced genuine airbag. still same corner going down but slow. I switched both rear bags to check a bag leak but still its going down from same corner. than I switched lines from valve body to check valve body but still its dropping down from same corner. can u help in this ? what should i do?
So what was the problem the airbag or compressor?
@@scorpionmafia1017 airbags in the end
Thank you very much for sharing what you know with us, Mercedes-Benz Master Tech Lou
👍
KNOWLEDGEABLE Mercedes-Benz Master Tech Lou
From Nick Ayivor from London England UK 🇬🇧 ⏰️ 17:53
Thank you for viewing!
Brother can you help me?
I have Mercedes w220 s320 2000 model
I have battery drain issue
Past 6 month I hunting to find it
I check all the door module
I checked seat control module
I checked real sam
I checked front right and left sam
I checked glow box light and locking swith
I checked sanroof
I checked tail lamp
I checked side mirror heater
I checked lisence plate light
I checked siren
Still I can’t find the drow
What is the next I want ro check?
Usually audio components cause draw in there cars. Radio. Telephone module. Amp.
@@MasterTechLou I removed command allso
In my car there is No amplifier , telephone module which in rear right under back seat I disconnected
Still I can’t find it
@@AdeemVlogz car needs to have all switches closed and be locked so it can go to sleep. some modules have 2 fuses so if you arent pulling both at the same time it will stilll stay alive. also it depends on your battery health and how you have the meter hooked up if youre actually testing the draw correctly. I hope you figure this out or have a close shop nearby to help .
@@MasterTechLou I connected mutlimtre black wire to battery positive and other to the car ground wire.then I switch the multimeter to amps settings ln10a ( before this I closed all the doors and also closed the trunk lock manually) after like 15 minutes I checked in MultiMere it’s showing 0.25 amps in 10a setting( that is 250ma)
This means we have drow right?
I think we need 0.05a(50mA)
Sir, I have one more doubt. When I switch multimeter to 200ma setting I am getting reading of (02.5)
Sorry for asking too many questions
In this time I removed fuse one by one to check any change is there or not but still not charged..
I allso check with old method like connecting 💡 bulb one battery terminal and one to car ground, still bulb glow aftr 15 mnts allso same
@@AdeemVlogz no meter is connected wrong, sounds like it. look up how to perform a parasitic draw test.
My gl550 was also dropping, had diagnosed as bad compressor and valve block. Replaced those and suspension has completely dropped on 4 wheels, and getting a malfunction and sometimes a compressor Cooling down light. Any advice on this please
Misinstallation
Faulty valve block
Blown compressor fuse
Bad compressor