2010 Audi S6 V10
 

So finally made this purchase, love the car. Purchased used, 60K miles. Within a few days, the CEL came on, then the EPC light. Had a friend pull the codes, told me it was the fuel pressure. Had him replace the sensor, however, he couldn't program it. Made an appointment, took it to Audi and they tell me they hear a slight rattling in the engine. I've read about the intake manifold causing this rattle? They tell me it could be related to the CEL, and need to car Audi support. Anybody have a similar situaton and want to share your horror story???