I bet you won't regret buying a Passat. I switched to VW after Accord, which I felt is the best animal in four wheels. I haven't complained since I got a Passat. I find it the most good looking car inside & out with loads of features. As Carguy said, it all depends on regular maintenance.
Moreover the human mistakes can be a dangerous as 7 speed DSG (AQ250) have seven type of internal TCM codes (codes vary upon engine 1.0T, 1.2T, 1.4T 1.4T+SC, 1.6, 1.8T)which means during software update if the service engineer installed other software the car will continue moving and driving but eventually the mechatroincs will fail and burn out due to overheating because of wrong version of software update that run higher voltage on circuits.
it even happened with me on my car when Ali&Sons engineer installed wrong version and lead to gearbox mechatronics failure in 10 days.
As Saleem says, the main problems that occur with these DSG boxes come from the clutch kit and mechatronics unit. Sometimes it's possible to recode them but more often than not, they're just fit for scrap.
A lot of garages who aren't familiar with DSG gearboxes don't realise that changing the oil and filter in the box should be done every 40k miles. People sometimes overlook this due to the extra cost but these people should ask themselves which is cheaper, a filter and some oil or a new gearbox? Prevention is always better than the cure.
I had a bad experience with VW DSG gearboxes with Ali&Sons in Abu Dhabi 3 years ago which lead me to sell the car when I got it back from the repair on the same week.
Go ahead and book an appointment with the dealer and keep the inspection copy and explain carefully every and each notice and comment that you have.
the 2 commonly parts which fails are clutch kit & michatronics and I'm sure that they keep stocks from it now but they may need a day or two days to obtain factory approval on warranty costs and they may give you a replacement car and may not!
the recalls in China and USA and Latin America came after law cases and court orders which would cost here much more than car value and lawyer charges so take the easy way and go ahead and start the warranty claim.
just a thought after repair you may ask for trade in from the dealer but go for any model with 6 speed (like Polo 1.6 or Jetta 2.0 and Tiguan 2.0T others have a dual clutch even GTI & CC & EOS) except Touarg it have a 7 speed but with conventional torque converter they call it DSG also while it is the same on Porsche Cayenne which called PDK which made by Aisian - JATCO and currently belongs to Nissan- Renault group.