GL Class (X166) 2013-2015 after facelift became GLS (X166)

Suspension q

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Old Mar 15, 2015 | 10:15 AM
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LIRS6's Avatar
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'14 GL550 , '79 911SC
Suspension q

Parked my GL550 on a slight incline, went to check the front right wheel as I had hit a typical NY pothole. No damage to wheel/tire, but as I was examining it, the suspension settled quite a bit - I'd say an inch or so. I could hear the air being released. Is that normal? I've never noticed it do that before. The car was in sport mode - I had not changed the suspension setting.
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Old Mar 15, 2015 | 07:33 PM
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Yep... Normal behavior.
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Old Mar 15, 2015 | 10:24 PM
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Originally Posted by cyclrder
Yep... Normal behavior.
Thanks - but what is happening?
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Old Mar 15, 2015 | 11:13 PM
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Originally Posted by LIRS6
Thanks - but what is happening?
The suspension on the GL uses pressurized air bags instead of steel springs (i.e. Airmatic). It's simply some air being released from the system.

Totally normal.
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Old Mar 18, 2015 | 11:26 AM
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yep normal...I love the hissing noise it makes
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Old Mar 18, 2015 | 05:28 PM
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Hmmm... what if only the front suspension goes all the way down? I suppose that's abnormal? But if I leave the suspension in raised level I don't hear this hissing sounds and the height stays raised. Could that indicate a leak then?

Last edited by mb_rpl; Mar 18, 2015 at 05:50 PM.
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