Problems with W203 interior pollen filter replacement.
I have a UK spec C320 CDI (2006) and I'm in the process of replacing the interior pollen filter. I have followed online videos to remove the cover under the passenger footwell and have found a large box that I cannot open.
I can see obvious screws to remove the adjacent parts (I assume the blower motor) but the box seems to be totally sealed and I have no idea how to open it.
Any suggestions would be most welcome. I have attempted to take photos of the box. Many thanks.
Stewart


