Antony,
I have a 57 reg Zafira 19CDTi 120ps Auto as a tow tug, I pull a 2004 Bailey Pageant Moselle with a MTPLM of 1300Kg which it pulls perfectly, fuel consuption seems good, and it always feels very stable even with 4 adults and a 12yr old on board.Being Auto it does drop down the box when going up steep hills resulting in fairly high rev's and it doesn't seem to have the "Ooomph" i.e. power that my previous Ford 'c'Max 2L had on upward climbs although the Ford was 136ps & manual, but then the ford had it's faults, one of most concern was that the clutch got very hot when reversing up even the slightest slopes with the van on the back. I am very carefull how we load & the weight we carry but i am very happy with my Zafira and it is very capable of the job i need it to do, having owned a 4x4 previous to my C Max & Zafira I personaly would not go back to a 4X4 in todays fuel/tax climate, but then eveybody to their own. Happy hunting!