Date registered: Jul 2010
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fan noise from back of SL550 - 2007
There is what I may describe best like a fan noise coming from the rear of SL550 2007. The noise pitch changes with the RPM. So if you push gas, the pitch changes. It is most loud when the enginee is idilling or slow driving.
Mercedes garage suggested to replace gas tank but without deeper testing, they were not sure. Could it be a fuel pump?
Everything works fine in the car - the noise is very disturbing but less loud when cruising.
I would appreciate any experts commenting on this issue - or anyone who may have had the same problem.
Last edited by m0101; 08-27-2010 at 06:00 AM.