I have just converted a 1988 G300 ambulance into a camper. The base vehicle is very similar to the one that 'Devil1964' has built his vehicle upon.
I got hold of this vehicle by pure luck a little more than a month ago, and my wife and I have used the last four weeks painting it and building an interior in it.
The vehicle is a 1988 G-wagen (5-cyl 3Litre N/A diesel) with a Zeppelin Shelter. It has diff-locks front and rear, 24V electrics, and two Webasto heaters. It has only 42.000km (26.000 miles) on it.