GL Class (X164) 2007-2012: GL320CDI, GL420CDI, GL450, GL550

How do you Reset Airmatic System?

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Old 02-11-2019, 04:40 PM
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1987 Porsche 928 S4, 2009 Mercedes E350, 2011 Mercedes GL450, 2003 Mercedes ML350
Right side Higher than Left side after hitting Raise button

**Repurposed Thread**


I toggled the suspension raise button on the console today and noticed only the passenger side of the vehicle is raised. The compressor kept on running so I shut the truck off. It's remained the same height one side for about 3 hours now and won't return to a normal height.

The left rear spring is also sagging. When I unlock, I can hear air pumping into it, but there is a hiss right away and the inflation stops completely. This corner of the car sits way lower than any other corner.

What could be causing both of these issues?

Last edited by Uranium238; 02-11-2019 at 06:32 PM.
Old 02-12-2019, 02:52 PM
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2005 Mercedes C230 Kompressor, 2008 GL 320 CDI, 2008 ML320 CDI, 2016 GLE 300d AMG Night Package
Originally Posted by Uranium238
**Repurposed Thread**


I toggled the suspension raise button on the console today and noticed only the passenger side of the vehicle is raised. The compressor kept on running so I shut the truck off. It's remained the same height one side for about 3 hours now and won't return to a normal height.

The left rear spring is also sagging. When I unlock, I can hear air pumping into it, but there is a hiss right away and the inflation stops completely. This corner of the car sits way lower than any other corner.

What could be causing both of these issues?

Sounds like a blown air spring if the compressor is running.
Old 02-13-2019, 02:15 PM
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1987 Porsche 928 S4, 2009 Mercedes E350, 2011 Mercedes GL450, 2003 Mercedes ML350
Yup. Found the spot leaking air. I have 2 rear bellows on order.
Old 02-17-2019, 04:21 PM
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2011 GL 450
Originally Posted by Uranium238
**Repurposed Thread**


I toggled the suspension raise button on the console today and noticed only the passenger side of the vehicle is raised. The compressor kept on running so I shut the truck off. It's remained the same height one side for about 3 hours now and won't return to a normal height.

The left rear spring is also sagging. When I unlock, I can hear air pumping into it, but there is a hiss right away and the inflation stops completely. This corner of the car sits way lower than any other corner.

What could be causing both of these issues?
Similar issue also. Left rear can hear hissing and sags. Took to a shop to get on lift and look for leak. Lifted up to level 3 while on lift. Sprayed bag with water no bubbles, bag full and no hissing at all. 2011 gl450 on post lift running and no issues. Set GL down on shop floor, and stayed perfect in ride height 3. Put in normal with no issues. As soon as he backed it out of shop the left rear dropped and hissing.
Old 09-15-2019, 01:47 AM
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06 SLK55 AMG, 12 R350
If I remember correctly, If you have Star Das you can adjust the ride height on either side of the rear air shocks.

Hope that helps.
Old 09-15-2019, 04:15 PM
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Now just one GL450 with EORP.
Originally Posted by Jbchouinard
Similar issue also. Left rear can hear hissing and sags. Took to a shop to get on lift and look for leak. Lifted up to level 3 while on lift. Sprayed bag with water no bubbles, bag full and no hissing at all. 2011 gl450 on post lift running and no issues. Set GL down on shop floor, and stayed perfect in ride height 3. Put in normal with no issues. As soon as he backed it out of shop the left rear dropped and hissing.
There's a leak - replace both rear bags. $250 and 30 minutes total for a decent DIYer.

Originally Posted by Lioninstreet
If I remember correctly, If you have Star Das you can adjust the ride height on either side of the rear air shocks.

Hope that helps.
Yes you can - either automatically or manually. Auto mode relevels the car and manual mode can be used to reset the normal ride height, provided your inputs are within a certain range.
Slam it to the ground? Nope, not gonna work.

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