I have a 1995 740iL. I recently replaced the underhood climate control filters that are in the underside of the hood. From reading the message board postings, I understand that my car also has recirculation microfilters under the dash. Can anybody give me a detailed description of how to change the recirculation filters under the dash? I looked under my dash. All I see is the underside of a black plastic panel on either side of the dash that covers the entire underside. There appears to be two airfloww registers in each panel. One is a square black air outlet. The other one is round and has a perforated cover. I assume this is the return. I can't see any obvious location of the filters. Do these black panels have to come down? If so, how do I remove them? Thanks.