In my service book (a.k.a. Evidence of maintenance work) there are 4 filters listed:
But these two I'm confused about:
One of those is the cabin air filter OEM#64319195194 - but which one? And more importantly: what the hell is the other one?
I should note, though, that the service book comes standardised (there are diesel parts in there as well), so perhaps one of those is not present in the E89?
(Attaching photo as well, maybe the pictograms will help.)
- Fuel filter - this one is clear. In our cars part of the fuel tank and not a regular service item.
- Air cleaner element - this is what we commonly refer to as just the "air filter", right? OEM #13717582908
But these two I'm confused about:
- Micro-filter
- Recirculating air filter
One of those is the cabin air filter OEM#64319195194 - but which one? And more importantly: what the hell is the other one?

I should note, though, that the service book comes standardised (there are diesel parts in there as well), so perhaps one of those is not present in the E89?
(Attaching photo as well, maybe the pictograms will help.)