hi my 1st xtrail was a 2.2 dci sport 2005 pulled the caravan (1500kg) with ease.
had probs with intercooler and turbo this is down to there being a prob. with xtrails so be carefull make sure yours has a warranty.
now have a 2.5 2006 which is converted to lpg does not pull as good as the dci but no turbo so happy days.
my caravan is a bailey 2006 23ft long tow ball to rear 1350 kg empty.
hope this helps
regards..mark