Hi all.....I just bought a 2003 ML500, 68,000 miles. Runs great but....it appears to have a speed volume control. Speed up, the volume goes up, slow down, the volume goes down. There is nothing about this in any of my manuals. Does anyone know how to disengage this feature (hopefully without going to the dealership for another $500.). Thanks in advance for your time.

 

just tell the dealer to turn if off next time you go in.