2006 Mercedes-Benz R350 Q&A

2006 Mercedes-Benz R350 Question: High pitched "fax" squeal coming from car when off...sometimes hours later

I have heard of at least one other person with this identical problem but neither of us have an answer. After shutting off the car it will periodically emit a loud squeal from what sounds like the passenger side front engine area (almost a "fax machine" piercing sort of wheeeeeeeeee) and then stop. It will happen off and on without a pattern as to how frequently it recurs ...sometimes 4-5 hours after the car has been sitting. It is audible from a distance away from the car. The dealer has not been able to determine the problem. -
Answer 1
you have the infamous airmatic suspension, similar to the one S-class MB owners have grown to hate. the MB dealers are simply warranty repair stations, as 90% of their customers leave after the warranty expires. my suggestion is to find a local MB specialty shop; ask other MB owners who is the best. -
Comment 1
There is no other local MB specialty shop that is reputable (to say the least). Is this something that is familiar and can you tell me what it is/what is causing this squeal? I have had no problems with the suspension system....unlike so, so, so many others. -