I want to say they get 20 mpg and it has ventilated seats. I also like how rare they are (at least in the DC metro area).
15 F80 BSM M3, DCT, Exec, Lighting, 19s, HK, Adaptive, Top Cameras, BT (which I have no idea what it does), Xpel
09 C63 AMG, Eurocharged Flash, Klassen Monoblocks - sold
07 E90 335, UR Exh, Helix IC, Bav Sport Coils, iForged Swift- sold
E46 M3 - gone and always missed