2006 Mercedes-Benz SLR McLaren 722 Edition developed jointly between Mercedes-Benz and McLaren Automotive. The 722 edition refers to the victory by Stirling Moss in a Mercedes-Benz 300 SLR with starting number 722 at the Mille Miglia in 1955. The 722 edition has a modified supercharged V8 engine with 641 horsepower and a top speed of 209 mph.