The MD Jupiter is a West German supply truck that can carry supplies to and from the main battlefield. They are cheap and fast units to produce. They start of with a full bar of supplies but after use they can be drained from their supplies and require a fill up from the local FOB.
The MD Jupiters are best used as supply vehicles to stay with the main army. They are best kept away from the battlefield and hidden away. Keep them in a stopped position so vehicles near them can resupply their ammo, fuel and repairs.