Air conditioning control panel 1. Air volume adjustment knob 2. Temperature adjusting knob 3. Air purification system button 4. Air conditioner on / off key (A / C key) 5. Rear windshield defrosting and defogging button 6. Internal and external circulation switch key 7. Mode switch key 8. Windshield defrosting and defogging button 9. Fully automatic operation key (auto key) 10. System off key(OFF key) 117