The above means your van's max allowed weight is 1225kgs.
The Kia details are shown here. Scroll down and look at the Max towing weight.
Provided it's a manual, it'll eat it.
------------- Some days you are the dog,
some days you are the tree.
I have a kia magentis crdi which I think is the same engine as carens , I tow a coachman amara 380/2 which is of similar weight to the caravan you want to tow and it pulls it very well the only change I have made to car is MAD rear springs as the back end was a bit soft, I would have brought a careens but my magentis came along at the right price and have not regretted buying it, very underrated car in my opinion