Q why do the cc recomend a fully laden caravan to be only 85% of the kerbweight of the towing vehicle? my van has a mtplm of 1660 yet the kerbweight is 1600 on my vehicle which has a fantastic bmw turbo diesel engine and discs allround. when i load my car up with wife and 2 kids plus roofbox and fishing tackle this increases my weight by around 200kgs for somebody to reach the exact amount of mtplm you would have to weigh every single item that you load .i load my van to around 93% but when you put your passengers in, in effect your kerbweight increases i never have any problems towing my van only on grass when its wet!!!!!!!!! i am also acheiving 34 mpg with my little 3 series bmw