My Altea has 80k miles and serviced in accordance with Seat including DSG oil change at 40k. Problem is thta it has developed an horrendous rattle and grind manifesting itself through the whole structure of the car even when idling in neutral. It started when reversing up a steep drive and there was a sudden bang. I drove the car home very slowly for 3 miles and whilst the gears appeared to change normally there were continuous strange rattles and whines together with a rough and harsh vibration through the car. My mechanic is yet to trailer it away and diagnose the fault(s) but my feeling is that the dmf may be breaking up. Any thoughts or help from anybody would be greatly appreciated! This is the second VAG car with a DSG gearbox I have had that has failed!