I bought a MK 7 Transit van a few months ago, it came with 6 months warranty. A engine malfunction light came on the dash and then a Cog symbol with a ! Mark in the middle. I had a code reader and it came up with soot on DPF filter, so I took it into the garage and they cleaned the DPF filter. I was told by the mechanic that modern Transits need a good motorway run regular if not the DPF regen does not happen that burns the soot. If you only use it round town it will clog up, a new DPF is £1600 if it can not be cleaned. The burn off only happens when your exhaust is at a certain temp and your van doing a certain speed? I'm going to try to claim back on the warranty but was told it could be classed as user error?