Questions on changing from a B5.5 to a late B6

[matt21]

With my trusty B5.5 Passat TDI nearing the end of its life I have decided to replace it with a 2010 Passat Highline Estate DSG 2.0CR TDI. The car in question comes with warranty, 1 owner from new, and just 34k. It looks new. I plan to keep it for 5yrs and 80k.

I have a few questions:

What are the key weak points with a B6 of this age / mileage?
Assuming the transmission oils are replaced and I warm it up correctly should I be worried about the DSG box throwing up a big bill?
Do the DPFs cause many problems?
Will my winter wheels from my B5.5 fit on the B6?
Is there anyway to get Bluetooth audio and DAB without an aftermarket unit?..it has nav built in
What MPG should I expect? Over 100k my B5.5 averaged 47mpg

Thanks!!