Check which of the bulbs is defective.
Switch off the ignition and the lights.
Take the screwdriver out of the vehicle tool kit Link.
Press the lower section of the cover cap inwards Fig. 1 and detach it.
Loosen the screw.
Carefully pull the light unit out of the bumper.
You can unplug the electrical connector to make it easier to change the bulb.
Remove the bulb holder for the defective bulb from the light unit Link.
To change the bulbs for the brake light/tail light -A-, the reversing light -C- and the rear fog light -D-, carefully pull the old bulbs out of the bulb holders and then fit the new bulbs.
Re-install all the parts in the reverse sequence.
Check that the bulb functions correctly.