How old is your van, as I suspect the newer it is the heavier it is, which will impact on your choice of towcar.
A quick google is showing new models of this van coming in at around 1600kg. Personally I wouldn't want to tow this with anything smaller than a Ford Galaxy or similar, or perhaps a mid sized 4x4 like a Freelander 2 or Kia Sorento. You really need a car that weighs upwards of 1800kg, though others may well have a different view. There are plenty of threads on this site about towing "rules" and "recommendations", eg the law says not to tow a van that exceeds the weight of the car although the major caravanning clubs recommend that 85% is a safe place to start.