My first 300F (in 1964) had the headlight dimmer. I was 24 years old and wanted all the options to work on my car as I was VERY proud of it. The dimmer was just too much trouble so I turned it off and never used it after the first week. My current F has such an option also but I have never tried to use it as the car is almost never out at night. Should there be a question about its attachment, I can look at the obvious......exactly where it is attached to the dash pad....but how is probably hard to determine as looking up at the bottom of the dash pad from underneath is not going to work without Superman's xray vision. Larry W Jett 950 Woodside Road Suite 4 Redwood City CA 94061 650 368 3966 [Non-text portions of this message have been removed]