Had the same error codes on our van before Christmas
@Brodskibeat. The EGR cooler had previously been flushed at the local VW Centre, but only lasted about 4,000 miles before this happened again.
I now use a VW-trained Indy, and they also said that they don’t recommend doing flushes as it is a waste of money and would only delay the inevitable. I went for a new EGR and cooler, and front and back pipes too (both turned out to have split, another common problem).
From reading about others’ experiences on here, it seems that VW Commercial insist on doing a couple of flushes before they will change the EGR, either under warranty or as ‘good will’ out of warranty in some cases apparently. You might want to speak to your local van centre first, nothing to lose!
Andy