My car has no dust filters, should it?

[zeronero]

The other day I tried to replace the dust filters for the climate control system. I followed the method used in the "Mercedes E-class Owner's Bible" and when I finally got down the the filters there were none. It wasn't like they were missing there was not even a place to install them, no clips are anything.

I know that some of the 124 car have these, there are pictures in the Bible of it, why would my car not have it, it's of the the best 124's reguarding option since it's a V8 model.

Here's some pictures