You're correct...they are a pain to get to!
Benzmac showed me how to change these on my wife's '95 E420. They looked like they were the original ones from the factory. They were TOTALLY BLACK with dirt. The new ones really made a difference.
I took a bunch of pictures and will do a DIY article at some point.
By the way, we sell these filters in PartsShop. Be sure to order 2.
Bill Wood - Webmaster