I have one of those (92) big body cars that suffers from vibration. MB did all the usual items, all joints, suspension bushings, steering damper,drive shaft, shocks, etc. At one time they had it pretty good, but this vib at 45 comes and goes. The car delivered with Pirelli, which were changed due to this vibe issue. I have been on Michelin MXVs since then on a third or fourth set, I noticed when I checked I have two H rated and two V rated tires on the same axle (MXVs)I have been tempted to change brands because they tell me these tires flat spot, they wear out quickly but are the best available for the car.MB and every one tells me this should be the choice. Any great suggestions are welcomed.