Mercedes has a web site which allows you to look up active recalls:
Given that their agreement to recall vehicles is recent, the web site may not have been updated yet.
Here's a paragraph that may help (from the Consumer Reports story about the recall):
The recalls will be performed in batches through January 2022, and owners will be notified by mail when their car is ready for a fix. They can also call Mercedes-Benz at 800-367-6372 with questions related to passenger cars, or 877-762-8267 with questions about the Mercedes-Benz or Freightliner Sprinter. The automaker also plans to set up a website dedicated to the recall.