Rear Air Bags and Compressor
#1
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Thread Starter
Rear Air Bags and Compressor
I have a 2012 Mercedes GL350 with sagging rear air shocks. Several days ago, my wife noticed the rear passenger side sagging and this morning I noticed both rear sides are sagging. I ordered the Arnott A-2596 air shocks yesterday on Amazon and they should be here today. I will not be able to replace the air shocks untilTuesday of next week so here is my question....
If I remove the 40amp fuse that controls the air compressor, will it cause any damage or issues with the air system? Can I start the car and let the compressor fill the air bags and then remove the fuse?
Can I drive the car for a few days with the air compressor disconnected without any damage to the system?
After replacing the rear air shocks does the system need to reset and can I do that without going to the dealer?
Thank you
If I remove the 40amp fuse that controls the air compressor, will it cause any damage or issues with the air system? Can I start the car and let the compressor fill the air bags and then remove the fuse?
Can I drive the car for a few days with the air compressor disconnected without any damage to the system?
After replacing the rear air shocks does the system need to reset and can I do that without going to the dealer?
Thank you
Last edited by KYBRIGGS82; 05-04-2019 at 10:37 AM.
#2
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You should be fine till Tuesday.
Most warnings i give is to is to ensure that the owner doesn’t drive for weeks or months without doing anything about it.
Most warnings i give is to is to ensure that the owner doesn’t drive for weeks or months without doing anything about it.
#3
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Thread Starter
Thanks.. it started sag a couple of days ago on the passenger right and today it’s both sides. When it began to sag the air shocks would stay reasonably inflated but today after parking the vehicle the right rear deflates all the way down within 2 hours and the left rear deflates to halfway.
i just received my Arnott air shocks and I’m going to install them Tuesday. Is it best to remove the 40amp fuse for time between now and Tuesday or do you think it shouldn’t be an issue. I just don’t want the air compressor to burn up.
thanks
i just received my Arnott air shocks and I’m going to install them Tuesday. Is it best to remove the 40amp fuse for time between now and Tuesday or do you think it shouldn’t be an issue. I just don’t want the air compressor to burn up.
thanks
#5
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You’ll be fine until tues
day
you still have an issue. You still need to replace the air springs.
More than likely the leak is somewhere in the upper folds of the spring and only opens up when driving or at a certain level.
day
you still have an issue. You still need to replace the air springs.
More than likely the leak is somewhere in the upper folds of the spring and only opens up when driving or at a certain level.
#7
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2007 GL450
what kombifan said. These are cracks in the rubber; maybe you had a bunch of weight in the back, parked it, and then the suspension rose, squeezing the folds together.
Or maybe someone opened one of the doors and closed it again during the night. You have ghosts around?
Arnott insists on you changing the little nut at the end of the air line. I don't do that; I'd install the air springs and then after it's inflated, check for leaks at the air fitting. What I know about air hoses like that, you're better off not disturbing the fitting.
Or maybe someone opened one of the doors and closed it again during the night. You have ghosts around?
Arnott insists on you changing the little nut at the end of the air line. I don't do that; I'd install the air springs and then after it's inflated, check for leaks at the air fitting. What I know about air hoses like that, you're better off not disturbing the fitting.
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#8
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Eric in sd
Have you changed out Mercedes air shocks to Arnott air shocks without changing the new fittings? I would think being different brands that there may a difference when connecting to the new hose fitting.
Anyone else skip installing the new fittings supplied by Arnott and use the original fittings used on the original air line?
Thanks
Have you changed out Mercedes air shocks to Arnott air shocks without changing the new fittings? I would think being different brands that there may a difference when connecting to the new hose fitting.
Anyone else skip installing the new fittings supplied by Arnott and use the original fittings used on the original air line?
Thanks
#9
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I changed the fittings first time around, on the front, and regretted it. Never did it again. Did the rears twice and the fronts one more time.
If anyone needs fittings, I've got a collection now.
#10
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Thread Starter
Thank you! I think I’ll try not changing the fittings on both rear air shocks and see what happens.. When you replaced the rear air shocks did you simply remove the original air hose from the white plastic fittings from the old air shock and screw the old white fitting with air hose attached back into the new air shock ?
#11
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Thank you! I think I’ll try not changing the fittings on both rear air shocks and see what happens.. When you replaced the rear air shocks did you simply remove the original air hose from the white plastic fittings from the old air shock and screw the old white fitting with air hose attached back into the new air shock ?
If I remember correctly, yes, you unscrew the new one and screw the old one in the hole. It's going in to plastic, so be careful to not cross the threads. Maybe a little oil on the threads so you can finger tighten it easily. You can probably get away with any oil, but it might be a good idea to use silicone or teflon to be safe.
When you're lowering it, I like to bring it down with a floor jack and the motor running so the pump runs. Then lower the rear gently, letting the pump compensate as you go. Or just drop it all the way down and play this while it pumps up.
Last edited by eric_in_sd; 05-07-2019 at 12:47 PM.
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#12
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I just replaced my OEM rear air shocks with Arnott air shocks.. I got them installed all was perfect. This afternoon, 2 days later the rear passenger side air bag is is halfway down and the drivers side is a little bit down, i lifted and lowered the system with the dashboard switch and it appears to be normal for right now. I’m not sure what do or check but I sure would appreciate some advise.
#13
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I just replaced my OEM rear air shocks with Arnott air shocks.. I got them installed all was perfect. This afternoon, 2 days later the rear passenger side air bag is is halfway down and the drivers side is a little bit down, i lifted and lowered the system with the dashboard switch and it appears to be normal for right now. I’m not sure what do or check but I sure would appreciate some advise.
My guess is you didn't tighten the fittings down enough.
#14
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Eric in sd..
According to the Arnott instructions, it said NOT to tighten or remove the factory air shock fitting so I didn’t. I know to be very careful not to strip the threads and void any warranty with Arnott.
.
According to the Arnott instructions, it said NOT to tighten or remove the factory air shock fitting so I didn’t. I know to be very careful not to strip the threads and void any warranty with Arnott.
.
#15
That is correct, Arnott Springs now have a quick fitting installed as a result of a lot of installations where the threaded fittings were stripped by the installer. All you do is un-screw the fitting from the old air spring and remove the fitting from the line, then push the bare line into the new air spring fitting which is already installed in the spring and pull on it then it will lock in place.
#16
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That is correct, Arnott Springs now have a quick fitting installed as a result of a lot of installations where the threaded fittings were stripped by the installer. All you do is un-screw the fitting from the old air spring and remove the fitting from the line, then push the bare line into the new air spring fitting which is already installed in the spring and pull on it then it will lock in place.
It's simple to find out where it is leaking. Raise the suspension. Put a jack under for safety. Squirt soapy water on the various places a leak could be. Most likely is the fitting.
#17
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Thuan you for your responses. I’m going to take a look at the new rear Arnott shocks this Monday or Tuesday. I installed the new rear air shocks last Wednesday with the already installed air hose fitting and 2 days later I noticed a slight sag on both air shocks.
I hope this may only be a loose new fitting on the air shock and not the valve block. How do I know if the valve block has gone bad? I hate to just replacing expensive parts to finally resolve this issue..
I’ll see when I lift the car and use soapy water on the air shocks and fittings..
Again thanks!
I hope this may only be a loose new fitting on the air shock and not the valve block. How do I know if the valve block has gone bad? I hate to just replacing expensive parts to finally resolve this issue..
I’ll see when I lift the car and use soapy water on the air shocks and fittings..
Again thanks!
#18
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Yup. If there is a leak, find it. You'll get it fixed; it's just a question of when.
#19
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One quick side note... There's a good chance that ONLY the passenger side is leaking. The excessive drop on the pass side will cause more weight to be put on the driver's side, thus slightly lowering/compressing the bag.
Make sure your ride height sensors move freely, as well. Pop 'em off and check, then use a little grease in/on the cup/ball when you put them back on.
Make sure your ride height sensors move freely, as well. Pop 'em off and check, then use a little grease in/on the cup/ball when you put them back on.
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#20
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Thanks to all...Great advise! I will be mythological in my efforts and check the leveler sensors.
Now, just in case, where is the valve block located and how do you get to it.
Is it common for the valve block to be replaced on a 7 year old California car?
Now, just in case, where is the valve block located and how do you get to it.
Is it common for the valve block to be replaced on a 7 year old California car?
Last edited by KYBRIGGS82; 05-11-2019 at 08:42 PM.
#21
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Thread Starter
Also, after installing new Arnott Air Shocks does the system need a air shock setting reset?
Is there a way to get to the valve block without having to remove the passenger front wheel-well cover and the air compressor? I’ve checked You Tube but no luck.
Is there a way to get to the valve block without having to remove the passenger front wheel-well cover and the air compressor? I’ve checked You Tube but no luck.
Last edited by KYBRIGGS82; 05-12-2019 at 12:17 PM.
#22
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I had to reset the system on mine after I replaced both rear springs. I couldn't get the car to refill one of the new shocks after I did the install. I used my diagnostic system to do the reset and everything has been fine since then.
#23
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Thread Starter
I took my GL350 back to the installer and determined with soapy water there were NO leaks at the fittings or new rear Arnott air shocks. We looked at the exposed air lines in the engine bay and used soapy water on the valve block and fittings. NO leaks.. I was told it may be a leveler issue or the air system needs to be reset/adjusted! So I guess off to the local Mercedes dealership for an Airmatic diagnostic so it can be determined what the issue is!
Any ideas?
Any ideas?
#24
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If it hasn't happened since, don't bother.
If it comes back again. Then book an airmatic diagnostic and reset appointment.
If it comes back again. Then book an airmatic diagnostic and reset appointment.