A long wheel base, 5 meter 10, 4 wheel off road capable vehicle, fitted with viscous coupling unit, an autonomous diesel driven Eberspacher heating, locking differential, airco and with a indestructible 2.5 TDI axl engine with a variable turbo, which can (and will be pushed) to 150 bhp. Inside it will be fitted as a camper with dual bed kitchen. etc
If it was available in '44-'45 in the Ardennes we would have had a problem.