See also:

Valve clearance
Inspect excessive valve noise and/or engine vibration and adjust if necessary. An authorized HYUNDAI dealer should perform the operation. ...

Manual climate control system
1. Front windshield defrost button 2. Rear window defroster button 3. Fan speed control knob 4. Mode indicator 5. Mode selection button 6. Air intake control button 7. Air conditioning button ...

Spark plugs
Make sure to install new spark plugs of the correct heat range. ...