Does TACC deactivate if the car comes to a stop? If not (that is, if TACC stays active while the car is stopped), then a reasonable implementation would be to require the car to be in motion when TACC is first activated. That would make it more idiot-resistant, though not idiot-proof. I might still forget I previously activated TACC, but at least when I activated it, it was on purpose.
Once on, TACC is deactivated when it senses
1) a manual brake or
2) a manual turn off by the stalk.
So, an active TACC is not deactivated just because of stop-and-go traffic (even in full stop) if it does not sense any manual interventions above.
Once deactivated due to manual interventions above, TACC will wait for eligible conditions to invite drivers to activate it. The eligible conditions are the 2 mentioned on post 72 quoted the manual.
If either of 2 conditions is not met, there's no TACC invitation which means there's no circled grey icon with the speed in the center (in those pictures above, the number was either 18MPH or 70MPH).
If either of 2 conditions is met, there's a TACC invitation which means there's a circled grey icon with the speed in the center (in those pictures above, the number was either 18MPH or 70MPH).
There's a difference between an invitation and active TACC: grey icon versus lit-up teal icon with the speed number in the center.
From a parking gear, some Model 3 owners just swipe down their gear stalk so fast that the first one wouldn't work because the foot did not apply the brake pedal timely.
So they would do another swipe and it would be successful the second time because this time, the foot did apply the brake pedal timely.
It might become a habit so they may repeatedly swipe down the gear as many times as possible until the car shifts in gear.
The problem is: when they swipe down the stalk to quickly, they might not notice the status of TACC on the instrument clusters and they might get panic when TACC is activated.
It's just a matter of training. Train your eyes on the status of the instrument cluster.