Heres how i just put a set of 18x8.5 front and 18x9.5 rear AMG monoblock II wheels on a 1985 500 sec. The wheels i used were off a 1999 e55. The front wheels went on no problem. The rear wheels had to have 1/8 inch shaved off of the hub portion of the wheel. It cost me $100 bucks a wheel. It requires a CNC machine so dont do this youself. They fit perfectly no rolling the lip or pounding, fit like a glove. Requires the new longer bolts also. Hope this helps somebody.