I've recently upgraded to Revo Stage 2 on my 2.0 TDi 140, and had a DPF Delete... After 2 days the engine management light came on, first thoughts that came into my head was the DPF Delete was faulty. After plugging it into a diagnostic test, it turned out it was my Auxiliary Water Pump... after hours of searching, I could not see one within my engine bay, I phoned Audi Cardiff and they wanted a stupid amount of money just to plug it into their machines. Can someone confirm that the 2009 2.0 TDi 140 CR Engine has one please? And is this a fault that I NEED to get fixed ASAP or is it nothing to really worry about? The car is on 35k miles.