Is my Mercedes Vito with windows classified as a van or a car?

I have just bought a Mercedes Vito with windows in the sliding doors behind the driving seat and a row of seats. For speed limits, is it classed as a van or a car, and when towing is it commercial, needing...

What are the speed limits for a van that's been converted into a camper?

I have a Volkswagen T5 T28 van that has been converted to a camper van, the logbook has been changed by the DVLA and now states body type: Motor Caravan and the vehicle category is N1. What are the speed...