Questions re Radar Cruise

[rickfen]

We are currently on a trip thru Montana, Utah, etc. Given that there are a lot of "ups and downs" driving thru here, I notice if I have my cruise set to say 70 miles per hour, when going down a hill it keeps me at 70.
Is the cruise putting my brakes on and when it does do my brake lights come on. (Tried to get my wife to crawl thru the sunroof to look, but for some reason she declined)

Also, if it using the brakes, would this not overheat them on a long hill cause the car wants to go faster than 70 if I turn the cruise off.

thanks

 

[ep010835]

Excellent question. There are times when I can definitely feel the car binding down as it slows. I too have wondered exactly what the OP is questioning.

 

[ksoze]

The 8-speed transmission is pretty smart and will downshift as the cars momentum slows - possibly it is helping slow the car lessening the need for brakes.

 

[C-130Geek]

YES the brakes are on, and yes the brake lights do illuminate. I find the brakes actuate more if the distance is at 3 or 4 bars when driving in traffic than if distance is set to 1 or 2. Wonder how many miles I will get on brake pads? I was in Mt, WY, UT CO etc a couple of months ago and used the paddle shifters w/o cruise in mountains. Only problem, with 8 gears, dropping a gear or two doesn't usually help, had to go down 3 or 4 to get adequate compression braking.

 

[lobsenza]

One thing you can try is disabling the cruise going down the hill and see what happens with the speed when you are just coasting.

 

[kn5owa]

I was in Mt, WY, UT CO etc a couple of months ago and used the paddle shifters w/o cruise in mountains. Only problem, with 8 gears, dropping a gear or two doesn't usually help, had to go down 3 or 4 to get adequate compression braking.

I do the same thing - use the paddle shifters w/o cruise - but you know the old saying - "Which is cheaper - transmissions or brake pads?".

And, as the man said, if cruise is on, the car will apply the brakes on a downhill run - a little unnerving.

 

[Pamplona/Beige]

In my Cadenza the graphic in the center TFT display showed the back end of the car and little brake lights used to come on. The Genesis does not do this. Short answer is, yes the brake lights do come on when cruise is engaged and you need to slow down more than the engine/transmission can do on its own.

 

[kn5owa]

Actually, on p. 5-54, the manual states that cruise control is not to be used on windy or hilly roads.

But then, rules are made to be broken - right?

 

[Pamplona/Beige]

Windy roads or exit ramps confuse the system and could be dangerous if you are not aware of what parameters the system uses to judge ones speed.

 

[amartz]

In my Cadenza the graphic in the center TFT display showed the back end of the car and little brake lights used to come on. The Genesis does not do this. Short answer is, yes the brake lights do come on when cruise is engaged and you need to slow down more than the engine/transmission can do on its own.

At least on my Gen1, the brake lights on the dash icon *do* illuminate when the brakes are actually applied, and yes the rear brake lights do light up. You can tell when the car tries to slow down just by backing off the throttle, and depending on speed, etc., I think it sometimes downshifts also, but hard to tell for sure. But if that isn't enough for the circumstances, then it ups the anti and adds some brake as required.

______________________________

Help support this site so it can continue supporting you!

 

[gaggan82]

We are currently on a trip thru Montana, Utah, etc. Given that there are a lot of "ups and downs" driving thru here, I notice if I have my cruise set to say 70 miles per hour, when going down a hill it keeps me at 70.
Is the cruise putting my brakes on and when it does do my brake lights come on. (Tried to get my wife to crawl thru the sunroof to look, but for some reason she declined)

Also, if it using the brakes, would this not overheat them on a long hill cause the car wants to go faster than 70 if I turn the cruise off.

thanks

Hi,
I don't have a Genesis yet but I think I can answer the question.
My MB E550 does that. So if the cruise is set at 70 , if you accelerate and then let go off the gas, the car will brake to come back to the set cruise speed. I think that is one of the 'Better' cruise systems as it keeps a check on your speed. Very helpful to avoid tickets, you can set the cruise speed on the speed limit and even if you are accelerating and you want to come down to the speed limit, you just let the accelerator go and the car does the rest.