The marketing talk by BMW re foglights are a load of bull. Wht determines whether u have additional cooling is whether ur car is "hot climate version" (option S823A). I know that package is fitted to cars in SE Asia. Also u'll have additional cooling when u order trailer hitch as factory option.
The effect of foglights is minimal if u have S823A, & it's equally demanding to drive at Vmax on German Autobahn during summer cos European summers nowadays are scorching (Germany doesn't get S823A).