The all-new BMW M3 Sedan and BMW M4 Coupé. Race driver supports development. 2013-10-18 BMWtubeLeave a Comment on The all-new BMW M3 Sedan and BMW M4 Coupé. Race driver supports development. More at http://M-Power.com DTM race driver Bruno Spengler took part in extensive chassis set-up runs on the Nürburgring-Nordschleife.