Not only at Manthey and Porsche, but also in the BMW camp, the mood is low after the Norisring weekend: While Kelvin van der Linde was unable to start on Sunday following a crash on Saturday and left empty-handed, local hero Marco Wittmann's frustration over the Balance of Performance (BoP) was enormous.<br>"I think we gave it our all - maximized it once again," he says after finishing tenth on ...<a class='more' href='https://www.motorsport.com/dtm/news/bop-frustration-and-curious-tire-strategy-at-bmw-there-is-artificial-intervention/10840861/?utm_source=RSS&utm_medium=referral&utm_campaign=RSS-ALL&utm_term=News&utm_content=www'>Keep reading</a>