I found the first filter under the glovebox area, you remove a cover and the filter is there, slots out, full of pollen etc.

But there is another filter in this car, anyone knows where it is located?

Thanks

That's the charcoal filters that you found.

The more commonly replaced filter requires removal of the glove box.

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1997 E320

It appears since I do not have climate control, there is only 1 filter and it is in the passenger's footwell. It is paper impregnated with carbon so acts as both dust+odour filter.

I failed to remove the glovebox, if I pulled any harder I would have yanked the dashboard out! But it was not needed anyway.

One filter below -the glove box, sounds like you found it. A very quick job once you've done it once.

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1999 C280 Sport, 1967 911s Porsche