Bruno Spengler testing the brand new BMW M4 Coupé. Motorsport 2013-10-25 BMWtubeLeave a Comment on Bruno Spengler testing the brand new BMW M4 Coupé. Have a look at how a professional race driver like Bruno Spengler searches for the right set-up for the new BMW M4 Coupé on the legendary Nürburgring Nordschleife.
