Both the M3 and the AMG are highly tuned versions of production cars.
I would venture to say that with the vast majority of the population, while they may recognize a Mercedes or a BMW, have no idea what an M or an AMG is.
Drivers Club at Lime Rock - International Motorsports Research Center
Madison Avenue Sports Car Driving and Chowder Society (Only a Vice President)
Polish Racing Drivers of America (PRDA)
The Glen Club - Sports Car Club of America