DPF Status (aka Engine controller MB group 104 field 0 in VCDS)
FF01 Passive DPF regeneration (most of the time)
FF10 NOx regeneration (short, drops out when fuel use drops to zero, down hills and slowing down)
FF02 DPF Active Regeneration (five minutes or so)
FF20 DeSOx Mode (longer, up to 20 minutes, at the end of every fourth or fifth FF02)
These are in order of how often they can be noted.
I identified these by comparison with logged values, and comparison with descriptions in the 2.0 liter VW self-study guide.
Also saw infrequent FF40, and FF80 readings, during warm up.
would be interested in validation that these are still available via VCDS after the emissions fix is applied by VW,
and that polar fis folks have updated software to still work with the post-fix software