Headlights

http://www.dmmultimedia.com/3dtips_04b.htm

Pete Draper’s tips on car modeling

http://www.3d-palace.com/xenomorphic/education/doc_car_modelling_tips.htm 

Complete car with virtual studio

http://www.coldmind.dk/tutorial/index.html 

blueprints

http://www.the-blueprints.com/index.php?tutorials/3dmax/

http://www.suurland .com

http://www.smcars.net/

"Modeling a Fiat 500 using Polymodelling " by Karabo Legwaila

http://www.rit.edu/~ksl3424/tutorials/car/index.html

Modeling of VAZ 21093 by Kazus

http://www.3dm3.com/tutorials/vaz/index.php3ds max: Car Paint and Rendering setup with Mental Ray

http://www.3dkingdom.org/index.php?name=News&file=article&sid=541

uses mental ray, uvw and psd plus a cool garage environment: "SL500 Texturing and Lighting" by Simon R

http://www.simonreeves.co.uk/tutorials/3dtotal%20sl500/tut/index.htm 

good wheels and hdri, not much detail
how to model Leon II" by David Melchor Diaz

http://www.3dm3.com/tutorials/seatleon/ 

"Car Paint tutorial" and more by Daniel Buck

http://www.danielbuck.net/index.php?page=paint1_tut/paint1_tut 

http://www.danielbuck.net/index.php?page=tutorials