Saw this filter on www.124performance.com/images during some surfing of the Tech Forum. Go to the web site, click on w124 dash, then click on HVAC filters pages 1 thru 5. The filter is installed outside under the hood. If you or anyone knows how to contact the guy who has this web site, maybe we can find out how and where he got this filter. This filter is for pre 94-95 MBZ 300E/W124 cars. It is an aftermarket product.