I have had my 3.0 tdi Quattro for about 2 months now and have a question about dpf. I have read that you need good long runs to get dpf to regen and be over 2000 Regen to happen. If that is true then all my love runs will not cause the regen process to start as sitting at 70mph the car is only doing 1500 rpm. Is this correct? Do I need to sit in 3 Rd gear for about 15 mins on every long run? Bit confusing as some nights I get in from work ( 1/2 trip), in traffic and the fans run for while when I stop suggesting regen had started. Any help or advice apriciated.