Even with road cars, the big three have an agreement like DTM. "Okay. Audi, you keep the AWD thing going with the user friendly interior. MB, you guys stay true to the 'carved-from-granite' sturdiness and high class innovative features. BayEmVay, keep producing physics defying road cars built for the track. And remember, continue to make them all look alike. So, we ALL keep our sales numbers strong and stay viable!"