I had one of these. The sunroof leaked and you'd get a lap full of water. Not to mention the driver door didn't latch, so it would swing wide open when you made a turn and hopefully would swing shut on completing your turn. Still makes me chuckle to think of it.
BMW 328 Sports Car - built 1936 til 1930 designed by Peter Szymanowski, later chief designer by BMW. This was at a time, when there were very few sports cars driven, so this was the hottest car around. It served absolutely no purpose but pleasure!