It was a sales incentive combined with a service package and warranty for 10 years or 1,000,000 kilometres, whichever came first. The offer ended at the end of March, but obviously the liability doesn't. The engine does incorporate fast warm up technology, like the Renault 1.6 DCI 130 and Mazda's Skyactiv engines. I have never received any reports of DPF trouble with any of these, apart from a dipstick calibration error in Australia.