Hey guys based on research and personal opinion I bought a 2008 ML350 Certified vehicle today. The vehicle has a certified warranty on it for another 60,000 miles (It has 40,000 on it now). My girl friend made an observation when the car was in the garage when I go from park to reverse or to drive the transmission makes a bit of a sound. Like all car sounds it’s nearly impossible to describe and it’s something I've never heard before. I know with the shifter being just a button to shift type setup I was wondering if it was just a normal sound. Wondering what you guys think. It’s just a machine type sound maybe with a tiny squeal. The car is certified and has been checked out thoroughly (or so they told me) so I'd assume if the sound was out of ordinary it wound have been fixed before it was certified and sold. Thanks for the input and I love my new car.