So on my 2001 S55, 70K miles, I have this annoying vibration that I get upon take off, all the way until I am passed 45 mph or so. I recently changed my tires, michelins, balanced them, and got an alignment at the dealer. I changed my front rotors and brakes, rear shoes. I asked 3 people where they think it is coming from: None knows. One guy was able to notice the vibration I am feeling. He checked drive shaft play, mounts, engine and transmission mounts, NONE, everything looks Ok. It is not a shaking as one you get in a steering wheel. Is it possible one of the wheels is bent? Is it possible a transmission issue?