The second picture of the rectangular paper element filter is in fact the "cabin air filter" for '94 and '95 W124 cars. As others have said, they are buried under the wiper area, and in fact under the area which you have circled in red. You pull those plastic grilles out and a few more pieces and you can see the filters.

But it's moot, since your car does not have the paper filters. Interesting other filters, however - never seen/heard of those before!

Rgds,
Chris W.
'93 W124,
'95 W124