I have a 2018 MS 100D with MCU2 and HW2.5. I do not have the option to save dashcam video by honking my horn. I do not have the option to confirm that my car is locked (on walking away) with the car making a beep. My friend's ModelX has these. I thought the MCU was essentially the same between the two cars - why is the software different?
What firmware are you on? 2019.40.50 has the video save upon honk. I’ve never heard of any S beeping when car locks... same should be true of the X. Not sure about 3.
Save dashcam by honking was in the newest update, you may be an update behind. Do you have the other features from this update like the addition to the Stardew Valley Game? Beep on lock is a model X feature
Please check that you firmware is at least on 2019.40.50, and if it is please confirm the manufacture date of your car...