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On the question of DSG reliability, I think that many folks think that if it goes wrong it will be uber expensive and so are put off.
But, as TC pointed out, if any go wrong it tends to be while under warranty. If outside warranty, the situation has improved from the early days in that prices and DSG technical know-how have got better. I reckon that DSG clutches will last longer than conventional manual due to their self-protective features.
I don't think it is the clutches that go wrong. The Mechatronics unit is the culprit, ans correct me if I am wrong, no one has developed a repair loop for these yet?
Will people spend a couple of K+ to repair a 100k miles 6 year old car? Not talking GTI's but cars on general. I hope it doesn't happen, but if someone does not sort out a repair loop, I fear you will start to see a glut of tired DSG cars in the yards. VW will not spend out on a car that is 3, 4. 5. etc years out of warranty (why should they? I have mixed views here), and definitely not if not serviced by them.
I hope that people apart from VW etc, start to fix Mechatronics units! Probably only a small value part that corrupts the whole unit.