Three hours after I started the update while the car was parked in my garage, went back to check on it. Door unlocked and opened fine but both screens were dead and didn't boot up. Locked and unlocked the car a few times and eventually, the screens turned on but, with an error message that the update didn't get applied properly. However, the info screen showed that 6.2 was applied. But, then, a dash message indicated that all Driver Assistance features were disabled. I can see all the settings as per 6.2 but, all the driver assistance features are apparently not available. Rebooting the screens didn't help.
Had a similar loss of the Park Assist features when 6.1 was installed. But, they came back a day later. Hope this resolves itself too the same way.