The 2011 will have a somewhat complicated emissions system. I'd recommend checking on TDIclub for this model as there's not as many of the newest cars here.
The CR cars are pretty solid and perform well. They ABSOLUTELY will not tolerate contaminated fuel or accidental gasoline in the tank though. The consequences are expensive.
There's a lot more emissions stuff - things like exhaust flaps, pressure sensors, NOx sensors, the DPF (Diesel Particulate Filter), etc. Most of those things on their own are fairly reliable and won't cause the average owner problems but the earlier cars didn't have them.
One thing worth asking... What is your typical drive like? The DPF equipped cars really don't like doing a lot of short trips.