X164 Gl320 - Air Suspension Issue
Thread Starter
Newbie
Joined: Jul 2021
Posts: 8
Likes: 1
GL320 ML 350
X164 Gl320 - Air Suspension Issue
Had a front shock leaking air for a while, so recently replaced it, now have a new issue.
If i drive the car then park it up, the front will dip down overnight, not fully but half way,
However if i park the car up say midday, then later on in the day open the car without turning it on, i.e the pressure vessel refills the airbags, it will last overnight without the front dipping down and stay level.
Im thinking it could possibly be the valve block, or compressor leaking, when the expansion vessel re-pressurises the system there is no leak, but when the compressor was last pressuring the system it leaks.
Not sure where to check or if there is a common known issue with these.
Any advice is appreciated
Hamazz
If i drive the car then park it up, the front will dip down overnight, not fully but half way,
However if i park the car up say midday, then later on in the day open the car without turning it on, i.e the pressure vessel refills the airbags, it will last overnight without the front dipping down and stay level.
Im thinking it could possibly be the valve block, or compressor leaking, when the expansion vessel re-pressurises the system there is no leak, but when the compressor was last pressuring the system it leaks.
Not sure where to check or if there is a common known issue with these.
Any advice is appreciated
Hamazz
MBWorld Fanatic!
Joined: Jun 2014
Posts: 1,086
Likes: 443
From: Melbourne, Australia
2010 ML550 VIN WDC1641722A564750, 2010 B180
Either the valve block or a leak. Soapy water test with car on its own weight and at highest suspension height. Be careful getting under it, it doesn't have enough clearance if it falls. Do the soapy water test multiple times and be patient.
The bags roll onto themselves as they decompress, meaning that any leak in the bag stops as the height falls and the roll becomes deeper.
The bags roll onto themselves as they decompress, meaning that any leak in the bag stops as the height falls and the roll becomes deeper.
MBWorld Fanatic!
Joined: Jan 2010
Posts: 3,119
Likes: 784
NGL450 w/EORP, S550
If you didn’t replace both front bags, the one you didn’t replace is now leaking.
and like blown says and multiple other posts here state, a bag could be leaking in a certain orientation while it won’t be leaking in another just the way the bag folds - it’s fickle and unpredictable.
and like blown says and multiple other posts here state, a bag could be leaking in a certain orientation while it won’t be leaking in another just the way the bag folds - it’s fickle and unpredictable.
