I haven't run the roof top air conditioner other than when hooked to 30 amp electrical or off the propane generator. I don't see much of a reason to run the diesel while shopping or lunch, etc. The engine air conditioner works just fine once underway again even in 100 degree weather. I have run the propane generator for up to 3 hours so far with no problem if that is a desire. The more you run it the better off you are because you should run it at least once per month for at least 2 hours says the manual. As far as I know all Sprinter conversion vans except the Westfalia use the same Onan.
My fridge is the biggest concern. Underway we run DC, stopped with no electrical hookup we run propane and with electrical hookup we run AC. For short stops we leave it on DC. While traveling the house battery pretty much keeps it's charge. Gotta keep that beer cold.
Europe and England must have looser towing regs. I was amazed to see what we consider compact cars pulling trailers in England. The most popular tower seemed to the the VW Passat but I suspect they were diesels. I don't see why a Sprinter couldn't pull a Bambi. It certainly has the torque. There would be no reason to pull a toad (car) in my opinion since you can park anywhere a car can park except in a parking garage. Now that many codes and ordinances require the main level of a parking garage capable of access by ambulances and mobility vans you could even luck out in the newer parking garages.
I think I just broke my 666 evil devil hex message count.
