I have an 2000 (8L) A3 1.8T.

I bought two cabin air filters:

1. the active carbon one 1J0 819 644 A
2. the plain pollen one 1H0 819 644 B

I've replaced the carbon one under the bonnet (passenger side), but can't work out where the plain one goes. I unscrewed a couple of plastic retainers under the glovebox, but can't seem to get any cover off there easily.

I'd appreciate any help - thanks.