See also:

Side Repeater Light
If the light bulb is not operating, have the vehicle checked by an authorized Hyundai dealer. ...

Check battery and cables
Winter puts additional burdens on the battery system. Visually inspect the battery and cables as described in section 7. The level of charge in your battery can be checked by an authorized HYUNDAI ...

Automatic-dimming function
Your mirror will automatically dim upon detecting glare from the vehicles traveling behind you. The auto-dimming function can be controlled by the Dimming ON/OFF Button: 1. Pressing the button turn ...