Suspension Noise Problems of Mercedes Benz GL550

Gl550 suspension drops - malfunctions every year (summer time in texas) my Gl550-2008 was about 1 year old in August 2008) with 21k miles. I was parked in the local lowe's parking lot. When I came back from the store, the car body was sitting directly on the tires. In order to get home, I used the flood lift. The car remained lifted after using the flood lift for about a month. A month later we were on a road trip and we pulled over to get gas and it dropped again. Again we used the flood lift until we could get home. When we got back we scheduled a repair appointment. It was diagnosed by the dealership and they replaced the air suspension compressor. Less than a year later (may 2009) at 33k miles it happened again. Again I had to use the flood lift to raise the car back up. I took it back to the dealership but they could not duplicate it. Again it happened in April 2010 at 49k miles. The dealership diagnosed and replaced the entire strut assembly-left front air suspension. In October 2010, 54k miles the right front dropped. I used the flood lift to raise the car. I was in the garage. The garage door was closed. When I got out of the car I could hear hissing from the right front suspension that sounded like a leak. When I took it to the dealership, again they could not duplicate it and sent me on my way. One week later it happened again. The dealership again replaced suspension. This issue seems to happen every year in the summer. I believe the hydraulic seals used in Mercedes Benz airmatic systems melt or soften in the texas heat causing the parts to fail/leak. It is unsafe as it left us stranded with children many times.

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