We already covered airplanes from the Mad Physicist (Ralph Savelsberg) (here and here), let's take a look at his cars (click on the images).
VW Bug and Mercedes "Heckflosse" alias the "Autobahn":
Chevrolet Camaro from Chicago City Police:
Mercury Sportsman, 1946:
Each single one is perfect. It is worth to take a look at details like the wheels - almost each one of them is different even though the scale is roughly the same. Likewise, the mirrors, etc.
Now I am only waiting for a Trabant... If I stare at these images for too long, I may build one myself...