Need Some Help (Audi A6 2004)

[Whopperz]

Hello, i am working on Audi A6 New,
This is my seccond car, as i finished a chassis mesh, i found alot of troubless.
As First: I tried to make a Front/Back Lights, used some tutors, used Checker map to add' a lines to glass, but can't make a photo realistic Front/Back Light, if someone have any sugesstions or someone who can help me with that, i will glad to hear you guys.
As Seccond: I tryed a HDRi to use as Car reflection, used a uffizi_.hdr (that's one is most popular) but my car still don't have a realistic reflection, i got a Brazil r/s on my Pc, and vRay Adv, used a "Car Paint" Shader on Brazil Advanced, but no good result. If you have some properties to how set up a HDRi for global car reflection, or any options how to make a "Photorealistic" car paint with Brazil or without, please post some text here, i will be glad :)

Here is some Renders (Pre-one) how i modeled, don't it hard, coz i am still gimp at Max :) (this is 2 Days of modeling)

Thanks guys,
Whopperz In Da House :buttrock:

[disaac]

Have you looked at tutorial Basic Car Rendering setup with Brazil r/s by Emre Gorenemregoren
This worked well for me and definitely got me pointed in the right direction.