This is a particularly common issue with the 2.5L; the PCV fails in the valve cover and generally requires the replacement of the whole assembly from the VW dealer! Thankfully, DORMAN has come up with a valve replacement kit for less then $30 and you can do the repair in less then 15 minutes or so, YOURSELF with minimal tools. This part; can be purchased or ordered at your typical auto parts store or online, at places like rockauto or amazon.com. I have done the repair myself and it wasn't hard, didn't take very much time to complete.
DORMAN: PART #: 917-064 PCV DIAPHRAGM
Check out more info here:
http://newbeetle.org/forums/2-5-liter-gas/65633-re-2-5l-pcv-valve-failure-solutions-dorman.html
Your trouble codes; are typical, for this issue (they most likely; will be resolved with the replacement of the PCV diaphragm in the Dorman repair kit):
18711/P2279/008825 - Ross-Tech Wiki
16452/P0068/000104 - Ross-Tech Wiki
16891/P0507/001287 - Ross-Tech Wiki
DORMAN: PART #: 917-064 PCV DIAPHRAGM
Check out more info here:
http://newbeetle.org/forums/2-5-liter-gas/65633-re-2-5l-pcv-valve-failure-solutions-dorman.html
Your trouble codes; are typical, for this issue (they most likely; will be resolved with the replacement of the PCV diaphragm in the Dorman repair kit):
18711/P2279/008825 - Ross-Tech Wiki
16452/P0068/000104 - Ross-Tech Wiki
16891/P0507/001287 - Ross-Tech Wiki