17" AMG wheels on 99 E300
Rear tire size should be 255/40/17, not 245/40/17! Your rear tire needs to be wider to match the wider wheel.
Wheel width, offset, and lowered suspensions are what sometimes require rolling the fender lip. Some 17s (wide and low offset) require rolling fender, most 18s do not. If rolling the fender is holding you back from 18s, I suggest you visit the Tire Rack website to scope out all the 18s that fit your car without modification.



