AUDI: MIL ON; NO START OR ROUGH RUNNING (DTC P0087-RAIL FUEL PRESSURE TOO LOW). CONTAMINATED OR INCORRECT FUEL CAN CAUSE PERFORMANCE, DRIVABILITY, AND/OR FUEL DELIVERY PROBLEMS. RUST OR METALLIC DEBRIS FOUND IN THE FUEL SYSTEM INDICATES A MAJOR COMPONENT FAILURE. *PE UPDATED ON 6/14/2011. *KB