BMW 530 WIP 3rd render

So I've been working on this on and off for about 8 months now. I've kind of been using it as a project to improve my modeling (and it has vastly improved since I first started this model). It's the first time I've tried anything even remotely as complex as this.

Umm.. I chose this subject because I like BMW's sexy curves and 'cos well It's parked outside so referencing is easy.

Criticism is most welcome

1st render

2nd render