At this point my recommendation is leave it to dealer.
If you persist to attempt something maybe try FW in case of data corrupted.
For easy start change sw25 in system 2 to 10 equal function version 2.0 and reboot. I could help with FW monday.
Don't disassemble anything for now possible warranty voids etc. Any parts replacement must be at dealership expenses so they will want to troubleshoot/test/resolve it by their techs not you(customer).
A tree is known by its fruit, a man by his deeds. A good deed is never lost, he who sows courtesy, reaps friendship, and he who plants kindness gathers love.
Blessed are they who can laugh at themselves, for they shall never cease to be amused.
I don't reply to private messages from end users.
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