How do I open the fuel door for the Opel Mokka? Leah December 13, 2024 06:51 Updated Locate the fuel door on the outside of the vehicle. It should be on the left side. Gently press down on the fuel door and it will pop open. To close it, press down on the fuel door until you hear a soft click. Related articles Do I top up diesel or petrol for the Opel Mokka? How do I release the boot of the Opel Mokka? How do I pair my mobile device with the Opel Mokka? How do I release or engage the parking brake on the Opel Mokka? How do I turn on/off the headlights in the Opel Mokka?