Looks nice and smooth to me, keep it up! 
Sorry for the lack of updates. I haven’t had much time to work on it lately.
As you can see, tire material and some interior work.
Hey, maybe if we say his name three times, we could call Tyrant Monkey down here to take a look at this. He’s usually the go-to guy for cars, after all.
What an amazing tyre!
tyrant monkey, tyrant monkey, TYRANT MONKEY!
and now he should apear 
Tyrant Monkey is not some lowly demon who can be summoned at a whim; He is a powerful being who only appears of His own free will. 
More interior work, lights.
Point of inquiry: I’m using transparent + glossy mixed by frensel for my glass shader (no caustics!), but the transparent shader seems to be blurring things behind it. Does anyone know about this, and specifically if it can be fixed? Here’s a screenshot of the node setup: LINK
Great work! I can’t answer your question sorry because I don’t have a clue about Cycles whatsoever.