1. Turn the ignition key to the "ON" position but do not start the engine.
2. Press and hold the "Mode" button on the instrument cluster until the service indicator appears.
3. Once the service indicator appears, release the "Mode" button.
4. Press the "Reset" button on the instrument cluster to reset the service indicator.
Method 2: Using a Diagnostic Tool
1. Connect the diagnostic tool to the OBD-II port of your Alfa Romeo 147 This port is usually located under the dashboard, near the steering wheel.
2. Turn on the diagnostic tool and select the "Service Reset" option.
3. Follow the prompts on the diagnostic tool to reset the service indicator.
