Alright, slowly making progress at this. Trying to get everything buttoned up before it goes under the knife for the delete next month.

So far I've put in a new 105amp hour battery which took care of:
A559 - Shutdown (Instrument Cluster)
9E77 - Normalize Error (SEATS)
AA11 - Unknown Fault (Flexible-Bus Interface)

New right side fuel pump and fuel filter. That took care of:
4BDC - Fuel Vorfoerderdruckregelung performance fuel pump too low for
current delivery pump
4BDA - Fuel Vorfoerderdruckregelung performance fuel pump too low for current delivery pump

New Bosch MAF sensor. That took care of:
4BC2 - Air flow meter signal
4831 - Intake air temperature sensor
4BC6 - Intake frequency to low

Still left (with the addition of 1 new code):
4BF5 - Too long invalid NOx sensor upstream of the DeNOx catalyst NOx signal
A6D1 - Short circuit to positive or open circuit - additional water pump (Junction Box Passenger)
4A44 - Glow plug cylinder 3, control

4BF5 will be coded out with the delete.

A6D1 has me scratching my head. As far as I know, the 2011's don't have an aux water pump. Where is this pump actually located so I can go check to see if it's there?

4A44 just showed up yesterday, doesn't trip the CEL or seem to be affecting startup in any way but still going to have to get this one fixed.