This bulletin applies to 2016-2018 Audi A6 equipped with the 0CK transmission, 2017-2018 A4, A4 allroad with 0CK, 0CL or OCJ, 2018 A5 with 0CL or 0CJ and Q5 with 0CJ transmssion.
You may hear a squeaking noise from under the vehicle. The noise can be traced to the MTF pump V553. When removing the connector from the pump the noise is gone.
Replace the MTF pump with P/N 0CK321281K and flange screw N 91173601.