Hello all. Decided to upgrade to a scirocco gt tsi 2.0l. 2008 model with 30k on clock. However after only 2 months my exhaust management light has appeared on my dash. Phoned dealer and booked in. Thought filling up on 97 ron an a heavy right foot may resolve the problem. Within 50 yards of petrol forecourt the light went out. Dealer said no point in bringing car in with no fault light. 3 days later light back on. Still worth booking in and any suggestions r/e root of problem? Any help much appreciated