An SSM was just released for this concern. The dealer just needs to reprogram the DDM and PDM.
49217 - 2015-2020 Edge/MKX/Nautilus/F-150/Mustang - Mirror Click And/Or Ratcheting Noise
Some 2015-2020 F-150/Mustang, 2016-2020 Edge, 2016-2018 MKX and 2019-2020 Nautil us vehicles built on or before 18-Jan-2020 may exhibit a mirror click and/or rat cheting noise when using memory functions or easy entry/exit function. This may be due to the software in the driver door module (DDM) and passenger door module (PDM). To correct the condition, reprogram the DDM and PDM with the latest soft ware level of the appropriate Ford diagnostic scan tool. For claiming use causal part 14B291 and applicable labor times in Section 10 of the Service Labor Time Standards (SLTS) Manual.