I own a 2008 w211 550, since I bought the car back in 2012 with 32,000 miles, I've had alignment issues. At 50,000 miles the inside of the rear passenger tire was eaten away. In between that 30,000 and 50,000 miles I had a camber kit added to help with the vibrations and alignment. Today it has 58,000 miles, and I recently took it in for service and had two rear tires replaced, and a four wheel alignment. The car drove smooth for the first time in a long while but pulled to the right. I took it back to the dealership and explained the pull and they redid the alignment, and now the car drives straight but has a vibration in the front right tire. If there's anyone that knows anything that could be causing these issues please let me know, I've been fighting with this car for a long while now and would like to get it driving straight and right.

 

What kind of tires? Vibrations could be from many things. Bad motor mounts, bent rim, bad tire, maybe you have control arm/bushing issues in the back. Shouldn't need those camber kits if there's no wear on the suspension parts. The shocks/springs/struts could go bad too.

 

The problem with dealers is that you are isolated from the tech 99% of the time. Getting your tires from Discount Tire or such, they will tell you and show you your tire and rim problems. And farm and fleet for 4 wheel alignment on a Hunter Code Link, they let me watch them as long as I am wearing safety glasses. But not all their tech know how to do a Mercedes so you have to ask ahead of time and get the tech‘s name for the appointment. The Hunter machine has photos to view so the tech knows which nut to turn and where. The Code Link is a fantastic machine.