HOW TO RESET SERVICE INDICATOR

You need a unicarscan ucsi-2000 (mine is a few years so there might be a newer version out there, and also other brands) for 49 euros.
Download Motoscan app on Android(not sure if its works with iphone) and buy the upgrade for 30 euros.

It all takes just a few minutes.
You can also choose to put down a new service date years ahead. Same with next service by milage, so you'll never need to reset it again. I just keep mine for every 10000km or 12 months as a reminder.

Note that doing the service yourself void the warranty.