[Rudeja]

So my wife and I upgraded from our 3 series to the 5 series, we both got 2011 535i, wife got the Xdrive Prod date 09/2010 and I have the sport package prod date 04/2010. driving both cars I can feel a big difference, my car engine is quieter and smoother, it has a slower pickup. my wife car has more aggressive sound, better pickup. I took a look at the engine and mark the only difference I could see.