I'm new to this, towing something as big as a caravan behind me. We have a Fleetwood Sonata Prelude, MRO1100kg, MPTLM 1425kg, but actual towed weight would be closer tp 1300kg with whta we had in. It was towed by a skoda superb 2.0 diesel, 150bhp (2wd) . The car pulled ok (i didn't know what to expect) with more than usual changing gears....and fuel consumption halved., but the most worrying thing was a feint burning smell. i couldn't get it all the time, but my wife could. i read that this could be the dpf working overtime, clearing the excess fuel consumption, should i be worried about this smell