I bought a 2000 S4 last year from the pre-owned certified Audi program. I've had a number of annoying things go wrong - windshield washer pump, headlight washer pump, cruise control twice, a variety of sensor malfunctions, and a troubling tendency for the EPC light to come on which leads to a significant reduction on power while driving. I was wondering has anyone else had this many problems? Any ideas on the EPC light? Diagnostic scans picked up no faults. I've got 1 year left on the warranty and only 82k kms on the odemeter. Question really is - Do I trade it in and try it again or do I bail?