The air filter is located here. Remove the side cover...
To undo the retaining clips, press the insert and remove the plugs...
and keep them in a safe place
Undo the four retaining clips
Carefully lift away the air filter box
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