I'm renting a Fiesta, not sure which year. It has these buttons on the dash, what do they do?

Ford Fiesta dashboard buttons with a line and a curved line

Ford Fiesta dashboard button with a dial and a lamp

I already figured out that another button changes the color of the mood lighting nonsense.

  • Ummm.. push the buttons and see what happens? The second one appears to change the instrument cluster backlight intensity.
    – 3Dave
    Apr 11, 2018 at 13:10
  • @DavidLively I pushed them and nothing obvious happened. Pushing random buttons in a car and seeing what they do is not a great strategy, though.
    – endolith
    Apr 11, 2018 at 14:21

2 Answers 2


There are 2 of those function buttons.. They are the audio control buttons 1 to 4. They control various audio mode functions like switching between Radio/CD etc.

  • I tried to add pictures to this but it didn't work
    – endolith
    Apr 30, 2018 at 13:26

I don't know what the first one is. The second one adjusts the instrument panel illumination up or down.

  • I tried that and didn't see any change, though.
    – endolith
    Apr 10, 2018 at 16:35
  • The control and symbol are DOT-mandated here in the US. The adjustment might only operate when the headlights or sidelights are on, or be invisible in the daytime, or the control may be broken or disconnected. Apr 10, 2018 at 17:02
  • I tried again and it does adjust the instrument panel illumination, it's just not very obvious changes. What DOT mandate covers things like this?
    – endolith
    Apr 11, 2018 at 14:20
  • 1
    Look in the FMVSS - the Federal Motor Vehicle Safety Standards. Apr 11, 2018 at 15:13
  • 1
    No idea; I assumed it was in the FMVSS, but don't see it either. It does appear on many cars. Shrug. Apr 11, 2018 at 18:58

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