NHTSA Complaint #11557795 — 2022 TESLA MODEL S

Tesla, in multiple cars that I own, has repeatedly changed user-preferences of user-selections, without warning, or update notes, for a variety of functions. This seems to be a consequence of sloppy software coding and seems to coincide with new software releases. In recent months, Tesla has attempted to inform people of new software update functionality with ‘release notes’. However, these notes seldom, if ever, explain that a user’s preference is getting discarded (though could be restored -- if the user were aware). One example, is the operation of ‘Traffic Aware Cruise Control’ was changed from a double click of a scroll wheel to a single click. No release nor or manual page was called out to indicate the change — at least prior to this driver’s noticing and diagnosing the problem. Nor was any pop-up message explaining the new, and surprising functionality of a ‘double-click’ — which was to momentary activate and deactivate TACC. Other functions that get changed, without notice: 1) operation of automatic windshield wipers is deactivated (and set to ‘manual) — from the user-preference of ‘auto’; 2) Auto park chimes sounds are turned off — despite a user-preference setting them to 'on'. These changes to the UI, necessitating guesswork using the large glass screen, prove to be highly distracting to a driver in the midst of driving. In addition, these undocumented and un-communicated changes lead the consumer to contact Tesla and even setup ranger service to make a repair for what ends up being a sloppy manual — to the detriment of Tesla’s effectiveness of their Service Department. If Tesla cannot make the user interface operate in a coherent manner day-to-day, there is no hope that any alleged full self driving will avoid reverting to some unknown configuration on unknown time scales. Perhaps Tesla should repurpose engineers that make video games for the car to the purpose of regression testing to avoid surprises like these.