I _think_ one of the two German upper class manufacturers (either BMW or Mercedes) already has cars with a 42V system, but I'm not sure.

6V always reminds me of the Trabant (yes, I read the Trabant BB a lot... [Linked Image] )... they had 6V electrics until 1983! Made for very thick starter cables and frequent failures due to bad/high resistance connections. On the other hand... that car didn't _have_ anything electric! The windscreen cleaner was operated by a hand pump... you simply pulled the handle out of the dashboard...

The later models did have some funky features... the one I drove myself when I was about 14 had a "momentary fuel consumption indicator" - a flow meter in the fuel line from the tank to the carb with a set of LEDs that light up indicating the consumption.