I tow with a Mitsubishi Outlander (is that an MPV?) it pulls 1300 kg like a dream. In the past Scenic, Zafira and Honda Stream have all been tow cars of the year somewhere or other. Like all other vehicles, it is essential to understand the limitations of the MPV before using it for towing. Scenics have, or had, a very low Max Towing Weight, 1000 kg if a passenger is carried. Current Toyota Corollas and Avensis' all have a low Max Tow Ball Limit, between 55 and 60 kg. Using the very rough 7% limit for tow ball weight this produces an advisable towing limit between 785 and 858 kg. Many Zafiras, including the diesels also have a surprisingly low towing limit. There is nothing wrong with an MPV but please choose one that will match your caravan weight.