congrats.. the wheels depend on the offset and the closest I can find are these http://www.ebay.com/itm/19-Brabus-Monoblock-V-Mercedes-wheels-SL500-oem-VI-SL65-amg-SL55-CLS500-CLS55-/141020415415?pt=Motors_Car_Truck_Wheel_Packages&hash=item20d578c5b7&vxp=mtr
but that's 10" in the back.. but the offset on those most likely means you wouldn't need spacers