Interesting; thanks for all your troubleshooting!
So yours is a US model, like mine, but one year newer.
Curious how yours is able to dial 911 from the SOS button.
While such functionality in place of BMW Assist would satisfy me, many out there who've lost all other BMW Assist functionality will still be upset regardless, no doubt.
If you ever learn how your car is able to dial 911 from the SOS button, please let us know; would be a major contribution to the forums!
