Hissing sound from the front of the car after shut down??
I have done a search but haven't come up with anything conclusive so I thought I'd just ask for my specific issue.
I'm praying this is normal and not an airmatic issue.........
........when I shut down the car and exit I notice a hissing sound and the front of the vehicle lowering *** if it's releasing air and or pressure. And subsequently raises when I start the car. Is this normal, if not what should be my next step??
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Location: Alabama gulf coast, formerly Charlottesville, Virginia
Drives: 2004 W220 (S430), 2001 R129 (SL500 Sport)
My '04 W220 makes all sorts of hisses, grunts, wheezes, and farts when it's going through its shut-down cycle. You won't notice it if you are in an open parking lot and/or you get out of the car immediately. I left my wife in the car to run in a store right after we bought the car, and she was white as a sheet when I got back. The AC dampers and valves all cycle to rest, the soft close vents, the suspension sometimes vents....it's a symphony. It does some of the same thing when you start up, but you have engine noise, AC fan noise, the radio may be on...so you never hear it. It's worth standing around to listen sometime.
"Don't pick a fight with an old man. If he is too old to fight, he'll just kill you."--John Steinbeck