I test drove a mazdaspeed 6 yesterday. I couldn't figure out what the roller switch on the far left of the dash was. it has 3 positions, 1, 2, 3. I asked the salesman and he told me it was foglight frequency. Sounds like bullshit to me. Can anyone tell me what this really is? I can't find this feature on the mazda website or here. I did search. Thank you.