Perhaps Frank can oblige us with a photo.
Hello Dave,
I have come to this topic very late but following up on John V6's 'Missing Filter Cartridge' Topic I decided to take a look in my Series 2 2009 Filter Box.
I am sorry about the photo orientation but Photobucket insist on turning the photo between the Library and here.

Easier said than done. I have no idea how to get into the Series 2 Filter Box.
What I did find during that look see was that the Sunken Brass Nuts have pulled out of the base.
They obviously screw in but they can only be accessed by taking off the lid which I failed to find out how to do?

I can see that there is a Filter in the Box but I have no idea what has caused the Sunken Knuts to Pull Out of the base?
I lifted out one of the Domed Grommets buy there only seems to be Orange Filter showing inside.
At that point I gave up the search.
If anyone can help with this dilemma I would appreciate it.
Frank On the series 2 roadster air filter box take out the two rubber plugs on the top. Take a long screw driver and undo the screws down inside. Undo the two screws that hold the hose across the top then lift of the box top. The Air filter is inside there and just lifts out to clean or replace. If you want to clean the top of the engine buy removing the base of the air filter box remove air intake pipes etc. and lift off. The engine top looks like this when air box removed. ( not the air induction filter ).
Regards Jim