C43 service reset
1. Press start/ignition once to go accessory without holding the brake
2. Go to trip display
3. Press Ok + phone call for few seconds.
For 2019+
3. Press back button + touchpad




1. Sit in you car and close your doors
2. Move to the screen that shows your odometer mileage on the center display/dash
3. Ignition in position 1 (press start button, but don't step on the brake. Do not start the car)
4. Press the "Back" button (left side of steering wheel) for 1 sec (keep pressing) then press touch pad on the left side of the wheel
5. "Vehicle Data" screen is now displayed. At the bottom of the list you should see "Assyst Plus"
6. Select "Assyst Plus" (use left touch pad) and it will take you to the next screen
7. Press the ignition switch, foot off the brake, to go to ignition position 2
8. Select "Full Service" (just press touch pad again)
9. Select "Confirm"
10. Select "Oil Grade" (this should be on your service ticket as 229.5 or 229.6, or on the bottle if you did the service yourself)
11. Select "Service Carried Out" (Yes)
12.Select "Confirm"
13. Shutdown your Car, open and close a door and restart your car. The service warning should disappear, and it should reset the date & mileage for your next service in the display


