I recently had coded my F21 to enable acoustic locking and unlocking, it like yours comes up in the menu and you can simply turn it on and off like any other option available. It won't work however if your car isn't equipped with an alarm.Today I was very close to brick my F55 Cooper AT
Here's what I tried to code with bimmercode:
* Start the engine without pressing brake. This option simple made my car not starting the engine at all. Nor with brake pedal down, nor without it - the engine didn't start. (I tried a long press on the start button, too). Then I tried "recover from backup", but it constantly failed reaching 15%. Finally I got it fixed setting this option back to "inactive". Oh God, it helped!
* Sounds when locking-unlocking the car. This option is now in the settings menu, but I can't enable it. Should I have an alarm to get speakers to beep?
* Video (codecs, video in movement) - still had no chance to test
* Start-stop off by default - it's the only option which worked
To sum it up, my experience with bimmercode is negative.