2010 BMW Z4 Reveals its Arse in Second Leaked Picturen less than 24 hours, a second picture of the all-new BMW Z4 found its way into the internet. Following yesterday's camera phone photo of the Bavarian roadster's front end that was shot during the filming of a new Michael Douglas movie , today we get a glimpse of the Z4's buttocks through what appears to be a scanned image from the official