You will need to remove the engine cover - undo the fixings using a 10mm socket
There should be 13 to remove
Carefully lift away the engine cover, and place somewhere out of the way
You will need to release the hood retaining clips as shown
Remove the interior trim; be careful not to damage this
You can now access the engine compartment
Here's the location of the air filter
Undo the circular clip on the air intake. Use a 7mm socket or a screwdriver to do this
Undo the four retaining clips
Carefully lift away the air filter box
View of the air filter cover
Clean off any debris on the surface of the filter. Replace with new filter if heavily contaminated
Check the air filter box for debris. Clean if required. Replace the air filter
Reassemble the air filter housing