I went to the website
https://bluetecupdate.mbusa.com/home (this is the Daimler site) and entered my VIN numbers and this is what was returned.
My wife's 2014 ML350, the solution has been fully baked and approved. I am contacting the dealer on Monday morning to get an appointment.
My 2013 E350, the solution has not been approved. Tentative date Q4 2021.
Until the work is done you cannot file the claim. This gives plenty of time for the prior owners (they have until the end of July) to come out of the woodwork and file for their part.
Even if you get the work done this week you still won't see any payout until late 2021 or probably 2022. For sure not until the fall, because of the deadline for the prior owners.
Update Monday Apr 5: got my appointment for Friday, they said it takes "a few hours". Will update after the work is done.