2012 Audi A4 Avant

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 FUNCTION EVEN THOUGH AUDI CUSTOMER SERVICE CANNOT EXPLAIN WHY THE NOISE WAS NOT APPARENT FOR THE FIRST APPROXIMATE 1000 MILES OF DRIVING. *TR