I recently purchased a 96 S500 (140) 96,000mi. and have had some major repairs. I just did the heads (resurface and valve grind). Heads were warped and the dealer said the block was warped as well. Has anyone ever heard of a warped block? I know the car over heated and a thermostat was replaced. That's why I blew the head gasket. My operating temp now runs between 84c and 100c, closer to 100c when driving 50miles or more. Is this a range that is ok for the car? I replaced old and worn out tires, thinking that was the reason for the shimmy in the wheel. With the new tires the ride has considerably improved, but there is still a light to medium shimmy in the wheel at different speeds (between 60 and 80 mph). Are there front suspension issues that I need to look at?

 

Need to ensure that ball joints and bushes are in good order.
Are you sure the wheels and tyres were correctly balanced OFF THE CAR?
Are you sure that the wheels are in good order i.e. Round and have not been heavily kerbed especially if steel.

Could be many things including the new tyres.

Stuart