Locate the air filter clamp...
Undo the circular clip on the air intake - use a screwdriver to do this
Locate the air filter lid
Release the lid from the air filter housing
Undo the two retaining fixings on the screen wash reservoir
Now move the reservoir to the side
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 air filter
Reassemble air filter housing