Nick,IIRC, there was a thread a while back that called this apparatus "BS"....... Also, the K & N air filter was a much discussed thread - conclusion K & N's allowed much too much dust, etc., through.
You might check out the archives, but they only cover June/July/August at: http://striplin.net/pipermail/mercedes_striplin.net/
Take care, Chuck Phoenix, AZ 1980 300SD "das alte Mädchen"
