Does this help?
Removal
1. Remove the drivers side foot panel. 2. Look under in the centre in front of heater assembly & there's a black rectangular panel that needs to be removed. - This has a bendy plastic tab to release. - Hard to get to ! 3. You'll then be able to see the first pollen filter tab which allows you to pull & remove by sliding it out. -The steering column is in the way! Many other sharp bits in the way ! 4. Surprise surprise .. there's another filter hidden in there! This can be removed by pulling the filter tab, lifting & riggling.
Replacement
1. I had to squash the filter to squeeze behind obstructions to slot in in .. but it did go in and fall to the bottom as intended. 2. Do likewise for the second one which will now slide in on top of the first. 3. Replace black cover with a click. 4. Put the panel back. 5. Apply band-aids!