Does that mean that if you shift down, the car will still accelerate / maintain speed and that "breaking on the engine" (slowing the car down by increasing the

Does that mean that if you shift down, the car will still accelerate / maintain speed and that "breaking on the engine" (slowing the car down by increasing the revs and not accelerating) doesn't work? What gave me a scare was lowering the cruise speed on the steering wheel by clicking the button a few times, which in fact caused the car to actively break quite hard instead of naturally lowering its speed. EDIT Now that I think about it, my BMW does not disengage the cruise when you shift up and ... I'm not sure if it does when you shift down.