Hi, I had the multitronic gearbox in a 2006 Tdi A4 and had a known issue happen to it, the ecu in the gearbox breaks down and has problems, it was resolved with a new ecu at £1200. Apart from that great gearbox, seamless gear changes and no other issues. Mine was a later gearbox that had the better clutch. I suspect though the multitronic boxes now may be better but can't say for sure