We tow a similar caravan with the S-max (Galaxy coupe!!) the plus points of these vehicles are stability and economy but traction is typical front wheel drive
Towed this summer with a 1.9 Galaxy down into France done about 1000 miles no trouble at all. WE were towing a New Senator Virginia.Just taken divlery of a new Galaxy Ghia 2 Ltr TDCI Auto
No problem towed my an Indiana with the 2.0ltr TDCI 140ps to Spain, Cornwall, Lake District great tow car. Now same as you changed to the 2.2 but as yet not towed with it.