1. 3 lights: yellow is oil circuit; green is detection zeroing; red is maintenance zeroing2. Function: re-check interval3. Voltage: 8-12V4. Operating temperature: -20 to 75 degrees Celsius5. Applicable models: for Volkswagen / Audi / FordInstructions:1. Plug the car OBD2 socket into the device2. All LEDs are blinking, than left on3. Turn the ignition key to enable the electronic board, but do not turn on the motor4. Press the button, the action to be performed in the short term5. The LED of the selected operation will be on, the other LEDs will be off6. The LED will perform the light chain, which means the reset is done

http://olla.gr/vag-si-reset-obd2-maintenance-lamp-returns-for-volkswagen-audi-ford/