Hi guys new to this site but I had the problem with the DPF it went orange 2 times both times cleared after a good 20 mins over 50mph. It then came on red and would not clear I got the Jag extended warranty engineer out and he repaired with a laptop in about 1 hour and then took the car for a drive for 20 mins and it was fine. He told me the problem with the system is that it does not tell you when it is regenerating or when it has finished so we could be stopping the cars before it has finished I'm sure Jag could program it to tell you on the dash when it has finished. John.