Try them in the order you list if you like, but it's Engineering Reset which will definitely fix the problem... at least for now. If it returns you will need to look at the firmware version you have loaded.
An Engineering Reset will not affect engine or suspension. It will return all user settings to default and wipe radio presets and Bluetooth pairings. You may like to take photos of every settings page to quickly get things back to how you like with regards to lighting, entry, locking, etc, blah and so on.
Cheers, Steve
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