Adaptive cruise control question.

[train21reb]

I had a thought: When the vehicle automatically changes speeds (slows down) do the brake lights come on? Seems like they should, but I would have no way of finding out.

 

[Mark_888]

I am just guessing, but if the vehicle slows down only by reducing the throttle, then brake lights would not go on. If the brakes were engaged, the brake lights would go on.

 

[EXBMWGUY]

I am just guessing, but if the vehicle slows down only by reducing the throttle, then brake lights would not go on. If the brakes were engaged, the brake lights would go on.

That is correct.

 

[sdavidson0316]

(I can only speak for the 2012, so if this doesn't apply to you then sorry)
If you look at the digital display in the middle of the dash (if you have one), the little picture of your car actually shows the brake lights as on when the car is applying the brakes. Try running your cruise into a stop light sometime and you'll see it happen.

Most of the time if you're on the interstate it will just use the engine.