Malfunction (Airmatic)
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Joined: Jun 2012
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2008 GL320CDI (310k) & 2017 GLS450 (160k)
Malfunction (Airmatic)
Drove almost 8000 miles in the past 30 days. Sometime in the middle of that, gray "Malfunction" message showed up. Air springs don't leak. Vehicle stays leveled. I was able to raise the vehicle and lower it with a button, once. Other times I tried, compressor would start pumping and after a while I'd get message that it's cooling. Vehicle would not be raised above normal. Compressor pump would turn on every morning. And most of the time during the day when I start the engine. Pump is also louder than before.
Does it sound like a need a new air pump?
Does it sound like a need a new air pump?
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Joined: May 2016
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mercedes GL 320 diesel Bluetec
Thread Starter
Senior Member
Joined: Jun 2012
Posts: 409
Likes: 22
2008 GL320CDI (310k) & 2017 GLS450 (160k)
Thread Starter
Senior Member
Joined: Jun 2012
Posts: 409
Likes: 22
2008 GL320CDI (310k) & 2017 GLS450 (160k)
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Thread Starter
Senior Member
Joined: Jun 2012
Posts: 409
Likes: 22
2008 GL320CDI (310k) & 2017 GLS450 (160k)
Ordered a new AMK pump, for little over $300. Not from Arnott. Took the old one out, it wasn't difficult. Pump is located right under left headlight. Have to remove front part of the wheel well liner. 10mm nuts accessible from the bottom. Disconnect 2 air hoses and 2 electrical connection, remove those 3 nuts and drop it down.
There was something inside of the pump when I shook it so I decided to open it up. Some bearings fell out of there and piston had a play of about 1 mm.
It would be nice to know if we can get parts to rebuild these.
There was something inside of the pump when I shook it so I decided to open it up. Some bearings fell out of there and piston had a play of about 1 mm.
It would be nice to know if we can get parts to rebuild these.
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MBWorld Fanatic!
Joined: Dec 2004
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next time try to work the hose out instead of cutting it 
that hose is of specific length an shortening it may result in failure of the hose down the road- especially if old and brittle...
they do come out. with a little persuasion
that hose is of specific length an shortening it may result in failure of the hose down the road- especially if old and brittle...they do come out. with a little persuasion
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Joined: Aug 2003
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From: In my garage
E55, GLS450, GL63, GLE350
MBWorld Fanatic!
Joined: Dec 2004
Posts: 4,268
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$458 is the list price for 1643200904 (airmatic compressor)
the book says 1 hour of labor @ typically $142-147. lets say the job gets tossed to a new tech and takes him 2 hours (i do it in 30 minutes)
what else is in the quote?
the book says 1 hour of labor @ typically $142-147. lets say the job gets tossed to a new tech and takes him 2 hours (i do it in 30 minutes)
what else is in the quote?
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Joined: Aug 2016
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2010 S550; 2009 GL550
Any idea what replacing struts on rear would cost? I understand that may be a little more labor intensive. Have now replaced the above and also two front struts. 75000 miles. Sure rears are next to go.
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Joined: Jul 2016
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From: Savannah, GA
2008 GL450, 2002 CLK 320 (gone)
A pair of Bilstein OE spec rear shocks on ebay is less than 500.00 with shipping. Although it is a bit of a pain to get to the upper mounts through the rear compartment, its not difficult and the entire process can be done in less than 2 hours. If you're not handy, order the shocks on-line and find a friendly independent shop to install them. Labor should be less than 300.00.
