The coolest truck: The MAN 630 Bundeswehr Truck I did my driving license on.
Unsynchronized gearbox. Took me a day to learn to shift from Gear 1 to Gear 2 and another day to master double clutching when shifting down.
Multi fuel, four wheel drive, but very little power. 100kW, 8.275 liter engine. Top speed was around 70km/h and the thing consumed 30l diesel per 100km. It had a crank for the “Schirmventilverstellung” aiding cold start, if you turned it the guy behind you got blind from the sooth.