Maybe mine is broken... I could not say I notice any difference.
Will have to look at this a little closer.
Current: 2013 F31 320D M Sport Black, 403M 19", ProNav, Black Leather
Previous: 2013 F30 320D M Sport AW, 403M 19", Bi-Xenon, Black
2005 E91 320D M sport, BSM, Twist 230 19's, Lemon
2002 E46 320i M Sport, Convertible, Titanuim Silver, 19
1998 Lotus Elise 111S, Black