First, undo the MAF sensor plug
Undo the circular clip on the air intake - use a Phillips screwdriver to do this
Undo the 4 x 10mm retaining bolts
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 a new filter if heavily contaminated
Check air filter box for debris. Clean if required. Replace air filter
Reassemble the air filter housing