wow! that first image is insane!!! I love the building reflecting off the front windshield. You have got to render out a logo on that front tire though. It is all about authenticity. If I where you, just render the logo itself and composite it in photoshop or gimp or w/e. In the first image, i would turn down that glow from the light slightly and see if that looks better.
thank you for the comments, for me one logo in the scene is enough.
But u are right the middle of the rim is a good place for one more small detail. And you are also right with the flare, for me they is also a bit to bright. But the compedition is closed and i can not do anymore adjustments at these moment.