Watch the BMW M3 and M4 Being Tested on the 'Ring by 2 DTM Drivers
25 Sep 2013, 08:03 UTC · By: Gabriel Nica / During the development of the new M3 and M4 cars, BMW knew that they had to bring in pro drivers to give feedback about the feel of the new automobiles. Since BMW's DTM effort has 4 teams and 8...