I also posted on the tech talk forum, but I'm newbie, so not sure where I should have posted: Hi. I have a 2006 BMW M5. For a couple of months now the car has had a slight vibration inbetween 2150 and 2350 RPM in every gear. I took the car to the dealer and the SA felt the vibration, but upon checking the car they couldn't find anything wrong with it. It's a light vibration, but defenitely there. It feels like I'm running over a small patch of rumble strips. It deos it in virtually every gear between 2150 and 2350 rpm. It's very annoying when I'm in say, 4th gear and going about 40 miles per hour. It's a normal speed to be in and the vibration is driving me crazy. I rode with the SA and I felt it from the passenger seat, but when your hands are on the wheel, it's more noticeable. Please help. Dealer cannot find anything wrong with it, but it has never done this before. My car has 44k miles and it had a new clutch and flywheel put in by the dealer under warranty in Nov 2009. It's a 7 speed SMG. Thanks. Albert