How to Reset the Smart Maintenance Light?
3 Answers
Smart cars are wholly owned by Mercedes-Benz, established in 1994, and are a luxury brand among microcars. The vehicles are equipped with two types of engines: the first is a 0.9-liter turbocharged engine, and the second is a 1.0-liter naturally aspirated engine, along with a very distinctive soft-top convertible. The method to reset the Smart maintenance light is as follows: 1. Turn on the vehicle's power; 2. Use the left multifunction button to locate the vehicle's maintenance information; 3. Open the vehicle's mileage data and hold the OK button for 20 seconds; 4. After the dashboard maintenance information starts flashing, press and hold the RES button; 5. The vehicle's maintenance light will be reset.
I've been driving my Smart for several years, and resetting the maintenance light is actually quite simple. First, make sure the car is turned off. Sit in the driver's seat without pressing the brake pedal, then press the start button to power up the dashboard. Next, use the buttons on the left side of the steering wheel to navigate to the menu with the wrench icon, and hold down the OK button for about 10 seconds. The system will then pop up a reset option—just select confirm. Older Smart models might require repeating the process twice to succeed. After completing these steps, remember to start the engine to check if the light has turned off. There might be slight variations between different model years, so it's a good idea to check the maintenance section of your owner's manual first. If you can't locate the buttons, take a photo of your dashboard and ask in the forum for more precise guidance.
Last time after helping my wife's Smart get serviced, I specifically researched this. The key is resetting it through the steering wheel controls. After the car is completely turned off, first press the one-touch start to light up the screen without starting the engine. On the left side of the steering wheel, there's a five-way button—scroll left to the settings menu, and when you see the maintenance reminder, long-press the central confirm button. Newer models might directly pop up a prompt, while older ones require holding for about seven or eight seconds. The system will display 'reset successful' when done. Note that some high-end versions require pressing the confirm button twice—this is usually illustrated in the manual. Avoid touching the throttle or brake during the process to prevent accidentally triggering other functions. If unsure, you can always call the dealership—they can guide you remotely.
