How to reset the maintenance light on a 2020 Mercedes-Benz C-Class?
3 Answers
20 Mercedes-Benz C-Class maintenance light reset steps: 1. Start the engine and enter the odometer interface on the dashboard. 2. Press and hold the OK button on the left side of the steering wheel while simultaneously holding the phone button on the right side of the steering wheel. 3. Select ASSYST-PLUS and press the OK button to enter, then select "Complete Maintenance" and press the OK button to enter. 4. Select "Confirm Complete Maintenance" and press the confirmation button on the steering wheel to complete the reset. 20 Mercedes-Benz C-Class maintenance light clearing method: 1. Start the engine and switch the dashboard display to the odometer interface. 2. Hold the "OK" button on the left side of the steering wheel with your left hand and the "Phone" button on the right side of the steering wheel with your right hand for several seconds. 3. Select "ASSYST-PLUS" in the maintenance menu and press the "OK" button to enter, then select "Complete Maintenance" and press the "OK" button to enter. 4. Select "Confirm Complete Maintenance" to complete the reset.
I previously owned a 2020 Mercedes-Benz C-Class, and resetting the maintenance light isn’t actually difficult—the key is to follow the correct sequence. First, park the car in a safe spot and turn off the engine. Then, insert the key and turn it to the second position (where the dashboard lights up but the engine doesn’t start). Next, use the control buttons on the left side of the steering wheel, typically the up/down keys, to navigate to the main menu. Scroll to the ‘Vehicle Settings’ or ‘Service’ option, where you’ll find a ‘Maintenance’ submenu—select it. Look for the ‘Reset Service Indicator’ option and tap it; you may need to hold the OK button for a few seconds to confirm. This will turn off the maintenance light. Why reset it? Mercedes’ system lights up the maintenance reminder after each service to prompt scheduled upkeep. If you’ve just had the service done, resetting it yourself avoids false reminders. However, resetting the light without servicing when it’s due is risky and can damage the car’s condition. In short, make sure the environment is quiet before starting to avoid distractions.
I've worked on quite a few Mercedes-Benz vehicles, and resetting the maintenance light on the 2020 C-Class is incredibly simple to do yourself. Turn the key to the 'on' position without starting the engine. Once the dashboard lights up, immediately use the left steering wheel button: first press the menu button to enter the system, scroll right to the 'Service' or similar tab, enter the maintenance section, select the reset option, and confirm for a few seconds. The whole process takes less than two minutes, saving you money and hassle. But remember, the car must be stationary—safety first. Resetting just removes that annoying reminder; it doesn't mean the actual maintenance is done. Regular checks of oil and other systems are crucial to prevent small issues from becoming big problems.
