Try another dealer.....with it being CPO'd you can bring it in and bug them until these are resolved.
I had problems with a CPO'd 335 and I took it to my local dealer (after purchasing it in Philly) and they took care of everything.
Its a hassle, but the squeaky wheel gets the grease! Don't give in, these are great cars when they're ironed out.
2011 Mineral White M3 ZCP
Paint Correct, Opticoat, Ventureshield and some CF and an intake