http://www.vwdieselparts.com/forum/viewtopic.php?f=21&t=11042
Yup - pilfering VW guys work again - but this one looks decent. Hard to do with the set up in the XD3T's - but I like in principle how it works. If it works well and it's physically possible to implement this would be the system I'd try to emulate... (So far anyway)
Rabin