I just love it. The arrogance of MB dealers is almost climbing to the same lofty heights as some VW dealers.
"We have sold you a motor caravan. We have described the body as an MPV, or to most people, a people carrier. Simply not a problem old chum, insurance companies should surely know better and insure you as they would a motor caravan".
Probably not a problem to most insurance companies. They will just assume it is a car, in regular use, Sainsbury's, school run, commute to work etc, and charge you the going rate for a car that indulges in all the hazards of that sort of driving. When Aviva tried to insure me they quoted a couple of hundred quid more than Comfort, on the grounds that they leave insurance for leisure vehicles to specialist brokers but would happily insure my camper as a car.
Comfort are old school. They assume the leisure vehicle spends most of it's time in the drive where it is lovingly polished, packed and repacked and any bird going anywhere near it to crap would be blasted to smithereens with the same old blunderbuss that great-great grandpa Jack used at Waterloo. Low mileage, gentle mileage, pottering around on nice trips to camp sites, and the mileage allowances reflect that. I have to insure for business use as my mileage is over 15k a year, but even then it's about £350 a year.
The simple answer would of course have the vehicle classed as a motor caravan, but on the VW forum just go and read the reams of threads where Beach owners don't want that because they can use stuff like Eurotunnel cheaper if they call it something else.
Horses on roundabouts and swings on courses I think.