Most likely 2006 VW Cabrio... sorry about the picture quality but it was taken with my cam phone...

the car is a hardtop convertable, decently quick and the guy seemed to be VERY nervous about me taking pictures of it, he tried to lose me a few times, and the last time he thought he lost me for good until i got stuck in traffic and he ended up under my overpass in the exit ramp, a sitting duck!