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I had two of my coilpacks replaced at my VW dealer today as expected. They were the car's 05 original ones. Car seems smoother but didn't feel rough before, if that makes sense.
I learnt today that my dealer has an in-house meeting every day at which the Parts Manager is present, to discuss the jobs booked for the following few days and parts are got in anticipation of possibly being needed. Hence my VW dealer had 4 coilpacks ready and waiting in case my car needed all four. As they said, it's just common sense and helps keep customers happy.