 at approximately 1000 miles on the odometer of my 2012 Audi A4 Avant Quattro, a strange noise began from the front area of the engine. The noise happens at the first startup of the engine regardless of ambient temperature. After about 2 minutes when the engine idles down the noise stops. Different Audi technicians at two dealerships have diagnosed the noise as 1) cam tensioners, 2) a bad bearing inside the cam case, 3) secondary blower motor and, 4) lash in the VVT system. None of the technicians have put a wrench on any of the named components because, according to the dealerships' service managers, Audi USA will not authorize repairs. According to Audi USA, the strange noise is a normal fu