Can you replace the filter in the manual AC unit with the activated carbon one that comes with the auto AC option. (I searched the forums and found discussion of pros and cons or auto ac and filters, but no discussion of substitution). I am ordering a 2006 MCS to replace my 2003, which had auto AC. The auto AC was a pain in my opinion, but I liked the carbon filter.

Anyone got pictures of the two types of filters?

 

EDIT: Oops, I see you're looking for substiution facts. Sorry, I wrote below on the classic "what are the differences". Guess I should read posts through first.

I'm certain the two filters are the same in length, width etc. and both fit the filter carrier under the dash. When I pulled the original out, which was supposed to have the activated charcoal, I checked it out. It has many pleats and looks like a two foot long accordion. Tree leaves and pine needles spilled out of the duct along with it. You can clearly see daylight leaks around the filter when installed. This is not some sealed HEPA system, it's just an improved vent sys. from old school open duct.

Being cheap, I flushed the element with Simple Green, rinsed and reinstalled when dry. I couldn’t see any charcoal bits between the layers, looks like paper only. The plan was to try to remove cigarette odor it inherited. It worked.

I asked the SA about the price difference and worthiness. He explained for smokers there might be a benefit to the spendy one but sells the basic filters ten to one. If you’re looking at allergy issues, I think claims of stopping irritants or pollens are advertising foo-foo. City traffic – pollutant defense? I think not. Activated charcoal will absorb odors but with a short life span.

So like most car accessories it’s subjective to each owner. Try both, look for a difference and buy what works. My choice is the basic flavor.