Having bought what I thought would be a good tow car about 2 years ago I now find that a Zafira can only tow up to 1050kg. This only came to light when we finally got around to looking for caravans.Though you see plenty towing on the road i'm now told my 2.0 DTI isn't up to the job of pulling a decent sized 4 berth. Has anybody got any thought's on this before I go and trade the Zafira in ?