To reset the service indicator on a 2020 BMW 3 Series, follow these steps:

Step 1: Turn on the Ignition

• Insert the key fob into the ignition slot, or if your vehicle is equipped with the Comfort Access system, simply have the key fob inside the car.
• Press the start/stop button without pressing the brake pedal. This will turn on the ignition, but the engine should remain off.

Step 2: Locate the Reset Button

• On the instrument cluster, find the small button protruding from the dashboard. This is typically the odometer reset button or trip odometer button.
• Alternatively, some models may use the button located on the turn signal stalk.

Step 3: Enter the Reset Mode

• Press and hold the reset button until the service indicator light appears on the display panel.
• Continue holding the button until the menu for service reset appears on the screen.

Step 4: Select the Service to Reset

• Use the same reset button you were holding to scroll through the available service menu options. Services identified might include Oil Change, Brake Fluid, Vehicle Check, etc.
• Find and stop on the service you wish to reset.

Step 5: Perform the Reset

• Once the desired service is highlighted, press and hold the reset button again until a prompt appears asking if you want to reset.
• Release the button and then press it again to confirm the reset. The service indicator will reset and the next suggested service interval appears.

Step 6: Verify the Reset

• Turn off the ignition by pressing the start/stop button without pressing the brake pedal.
• Turn the ignition back on to verify that the service indicator has been reset and there are no warning lights.

By following these detailed instructions, you should be able to successfully reset the service indicator for your BMW 3 Series, ensuring that your vehicle is ready for its next service milestone.