Before the oval cover can be removed, the plastic cover over the headlamp must be removed; see the section "Bulb replacement".
Unscrew the cover's four screws using a Torx tool, size T20 (1). They must not be screwed all the way out, 3 - 4 turns is enough.
Slide the cover to one side.
Remove the cover.
Reinstall the cover in reverse order.