The extra main beam bulb is fitted inside the headlamp's larger cover.
Applies to cars with Xenon headlamps*.
Detach the headlamp.
Remove the cover.
Detach the bulb by pressing the holder downwards.
Unplug the connector from the bulb.
Fit the new bulb in the socket and snap it in. It can only be secured in one position.
Reinstall the parts in reverse order.