Sun fade interior, and paint, dead Batteries -- yuck
Naww....
Modern cars do fine in the sun....and sitting let's the paint to harden more....no warnings about not washing a new car too soon...and diesel fuel, unlike modern unleaded has a infinite lifetime if it is cleaned and dry, in a sealed area (new tanks in a new car, so it should be clean and dry, no moisture).
Interior fade....hm...feel sorry for anybody who can't park their car inside in a garage even at work then...lol...that means about 90% of cars sit outside all day....even if they garage it at home....
Honestly, I'd have no worries. Besides....with a new car warrenty starting at day 0, lots of time to get stuff fixed if anything has issues....
In retrospect, they might be the best DIESEL cars VW ever sells...lowest prices, and best warrenty when you include the extended warrenty from the repairs.
If somebody likes VW TDI cars, imo a 2015 is a shrewd buy....keeps you in what might be the last VW TDI cars sold, new at a used car price! The pinnacle of tdi technology....with a lower price than the rest of the 2015 owners paid for it....
If you can find a car optioned the way you want, imo go for it.