I don't see anything wrong with jump starting a Sprinter or using the Sprinter to jump start some other vehicle, but that's just me. There is though a couple big caveats and that is to not connect or disconnect the system while there is a high surge of current occurring.
Two instances that I can think of:
1. Do not set the key position to ON while connecting the jumper cables.
Most of the time this is a non-issue because it's essentially like turning on a switch, but it's moved to the battery. But we all know the hand is not steady and to make a good jumper connection there will be some wiggling. With a dead battery there will be current going through the jumper cable. There may be a lot of current if the battery was badly shorted internally. The act of connecting/wiggling the clamps into place will cause spikes in the line. If the key was in the ON position, the ECU will see the voltage spike.
If we wait for the jumper cable to be connected, spikes to the ECU can be avoided. Doing it this way will be like turning the key to the ON position when you have a high powered audio amplifier (as in a dead battery) sinking current from the battery (battery from running jumper vehicle).
It's also a good idea to turn off any non-essentials when restarting a vehicle with a dead battery.
2. Do not disconnect a jumper cable while a vehicle's starter motor is turning.
We all know that a starter motor needs huge amounts of current. Disconnecting a line while it's in operation will cause a huge spike somewhere in the connection. More than likely it will create a spark where you disconnect it at the battery or it will find the shortest path somewhere on the jumper vehicle (vehicle providing the jump).
Once the alternator takes over, there should be very little current shared between vehicles via the jumper cables and that is the best time to disconnect the cable.
There's no need for surge protectors as long as you heed to the current (amperage) rules. We might hear a lot about the troubles or the sensitivity of Sprinter electronics, but I take it as an operator error. If you have a set up where you're switching house batteries to the starter battery (alternator charging), the same principle must be applied or you will need that surge protector.