[lloeki]

I had Test Car 8865, which was quite a bit more primitive but still fairly complete (a 4 cylinder reciprocating engine in a V configuration, a 3 speed transmission, a working rear differential, working front and rear double wishbone suspension, rack and pinion steering, retractable headlights, and adjustable and reclining seats)

http://www.technicopedia.com/8865.html

The evolution history of such cars, beautifully presented on SE, is fascinating:

https://bricks.stackexchange.com/a/14539