Here's a quick and dirty tutorial on how to get rid of the "Service Exceeded" message on the dash of your Mercedes. I'm not sure how many other models this will work for but this car is a 2019 GLE 400.
Watched about 6 different videos with incorrect directions before coming to yours. The minor details you provide made all the difference. Specifically the sequence of the steering wheel button pressing is why I was finally able to get this to work. Thanks for taking the time for the walk through.