Actually it is the AMG Aero II Monoblock. Luke at Tirerack emailed me and said the front is too small for load balancing for my SL, he said it may work but not recommended. Anybody has a 17x7.5 on the front? And what may be the probelm with a 7.5 in the front?
http://www.tirerack.com/upgrade_garage/WheelSearch.jsp?&autoMake=Mercedes-Benz&autoModel=CLK55&autoYear=2001&autoModClar=