Well it's that time again, MOT needed for my 2.4. Brera. Anyway, the good news is that it passed without a problem. While the guy was doing it I asked about the DPF, his comment quite surprised me, he said if I took it off, as they could be an issue, I would have to have the car remapped, no mention of it not being legal without one. I sometimes wonder if I worry too much.