Adaptive cruise control

[Amacron]

this may be a stupid question. It here goes it.

When the adaptive cruise control applies the brakes. Does the brake light also come on? I’m assuming it does but I’m always in the car and can’t see if it does.

 

[aggiegrad05]

I have ALWAYS wondered this. I’m really excited to hear the answer.

 

[Deadman]

If it doesn't, I would sure think thats a serious motor vehicle law broken!

 

[lobsenza]

It does. If the car applies the brakes, the brake lights come on.

 

[2018 EXPY]

yes sure it does.

 

[jwas1]

I thought most of the slow down with adaptive cruise control was done by engine braking. If so, brake lights will not come on.

 

[Regan DeMello]

I thought most of the slow down with adaptive cruise control was done by engine braking. If so, brake lights will not come on.

That is what I have read, transmission slow downs no brake light


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[Deadman]

That is what I have read, transmission slow downs no brake light


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The Adaptive on my 2014 will dynamite the brakes and send you into the steering wheel if a car turns in front of you. I can't imagine this wouldn't. I shut all that off on mine.

 

[mquick5]

Geesh, I don't believe my 17 has adaptive cruise control. What model is your 14?

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[MostlyHarmless]

Everyone above is correct - the Cruise will start by trying to use engine braking and dropping a few gears to achieve the necessary speed reduction, in which case there is no brake light. If the retardation required is more than that then the brakes will activate and the brake lights will always come on when the brakes are needed.

What's harder to identify from behind the wheel is which is which - a 2 gear downshift and lift off the throttle can feel like light braking, so it's hard in practice to know which is which

Mark