Step 1: Turn on the ignition of your Range Rover but don't start the engine.
Step 2: Press and hold the "OK" button on the steering wheel until the "service reminder" menu appears on the display screen.
Step 3: Use the arrow keys to navigate to the "Reset service reminder" option and press the "OK" button.
Step 4: Follow the on-screen instructions to confirm the reset.
Note: If the service light does not turn off after following these steps, you may need to take your Range Rover to a dealership or qualified repair shop to have it reset.