I can't see me using it, but a freebie from MB is a collector's item.
My authorization had expired and required a new one in the web portal. When I was going to do it, I received the same error message. Now later today, it worked out fine so it likely was a temporary problem.How are you meant to configure it? There's nothing in the phone app, and when I click on In Car Office in the web portal I get an error message "office.azure.mercedes-benz.com sent an invalid response."