How do you change a citroen c4 indicator bulb?

To change the indicator bulb on a Citroën C4, first, ensure the vehicle is turned off and the keys are removed. Open the hood and locate the rear light assembly where the indicator bulb is housed. Twist the bulb holder counterclockwise to remove it, then pull out the old bulb and replace it with a new one, ensuring it's securely in place. Finally, reinsert the bulb holder and twist it clockwise to secure it back in the assembly.