Matching your car to a caravan

Or neither on mine 

The term 'kerbweight' doesn't appear anywhere so he's only got mass in service to go by. Manufacturers aren't obliged to publish kerbweight so it won't be documented.

you said earlier that there can be a big difference between the two, people who have been towing for years know that but beginners won't. If all the clubs and forums and dealers and matching services talk about kerbweights then that's what they will go on or try and find out, as you say, only mass in service is printed on most v5c's so why does every authority/club/dealer never say these weights. hope you understand were I'm coming from with this. cheers.

The thing is, mass in service is a generic value that applies to all vehicles covered by the same type approval, regardless of what their actual weight is. This makes it easy to publish such data because it is largely independent of factory fitted options, some of which can weigh quite a lot.

Kerbweight, on the other hand, is an actual weight that is specific to each and every vehicle. To make any sense it must therefore be linked to each individual chassis number. It is therefore something that can't be listed in any brochure, handbook or database other than for general guidance purposes. A club, dealer, or towing compatibility website can never have kerbweight information because it's not documented anywhere.