I am looking to buy a c class for towing my caravan.Because of money available the petrol version fits my pocket as a 1to 2 year old car.Does anyone tow with the petrol model and how do you find it .The van is 1420 kg´s mtpl Challenger.I would be grateful for any info as I am due to buy in next 2 months so don't want to make a mistake as my wife says this is the last car for a few years.(retired so not easy to save money)