Yeah im happy now that my dpf is fine. After doing some research on the net I found out that the figure in vagcom meas block 68.2 is the actual soot loading ie.what soot remains in the dpf after regens.
As far as I can gather when this reaches 60 (grames i think it measured in) which normaly equates to aprox 90000 miles you would need a new dpf filter. Mine is reading 22.5 grams @ 39000 miles so if it carries on at the same rate im looking at replacment at aprox 110000 miles Touch wood!!!
I'm on 95k miles at the moment - could be walking on thin ice lol!