So what is the problem mentioned in this thread about not seating the filter properly. The filter should be seated properly if it "clunks" into place on the rod no? I had to use pretty good force to get that filter to go into place. I could see how some may not seat it properly by not pushing hard enough. With enough force, it clicked into place. No instructions came with my filter that was in the Mercedes part box. It was the one with the two white plastic bands around it. Got it from Mercedes.