Undo the circular clip on the air intake - use a screwdriver to do this
Undo the second circular clip on the air intake - again, use a screwdriver
Now undo the four retaining clips
Carefully open 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 air filter box for debris. Clean if required. Replace the air filter
Reassemble the air filter housing