Can you have your service at mb done one month earlier than usual?

I did that with my old E-Class, because it was not different in time, that had neither advantages nor disadvantages. It was entered in the checkbook in this way or so. You can do the service theoretically also a month later if there is no guarantee anymore on the car, which makes the technique nix. When I paid my ten-year-old car to BMW after 175,000 kilometers, no one was interested in a checkbook – even not that I had moved it and it wasn’t there. When I wanted to do it, it didn’t matter.