Don't believe that number. BMWs will always be cheaper in the U.S., it's never a standard currency conversion.
U.S. is BMW's biggest market, and given the current economic situation, there's no way a Z4 starts higher than a 5 series.
2008 528i: Ti Silver/Black/Light Poplar Wood, ZPP, ZCW, STEP, Comfort Seat, Heated Rear Seat, PDC, Xenon, Nav, iPod. 35% ceramic tint. VentureShield Clear Bra.