The Wife got the warning message “Particulate Filter: System Fault - See Owners Manual” on her way to work this morning. The car is still in warranty, but If I take it to Audi and they blame the type of driving for not allowing the DPF to do its regen, no doubt I’ll have to pay for the diagnostics etc. Would it be worth taking it for a good run up the motorway for 45 mins to see if it clears, or is it too late for that once the warning appears? The car does mainly 6 miles each way to my Wife’s work on a daily basis, plus some town driving. The last good run was 180 miles on 11th November. Any advice appreciated. Cheers, Paul.