Spent many summer vacations touring though Europe in a Mercedes 309D camper van. If I remember correct the engine was between the two front seats, where I would sit facing backwards (safety was an unknown word than) and it was painfully slow.

But for a show car I would look for a W111 280SE, they are getting more expensive but with a little-bit of luck you can still find them for $15K.

__________________
1979 Black on Black, 300CD (sold), 1990 Black 300SE, Silver 1989 Volvo 780, 1988 300CE (vanished by the hands of a girlfriend), 1992 300CE (Rescue).