Does presense work with a stopped vehicle?
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AudiWorld Member
Joined: Oct 2018
Posts: 186
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From: Wisconsin
Does presense work with a stopped vehicle?
Say I'm driving 45mph with ACC on and zero cars in front of me i.e. no car detected in the green ACC indicator symbol.
Now I rapidly approach a stop light with one car already stopped at the lights.
I've yet to have pre-sense apply the brakes. I let it go to a point where I chicken out then slam on the brakes myself.
Is this normal operation? Why doesn't ACC ever detect the stopped car?
Now I rapidly approach a stop light with one car already stopped at the lights.
I've yet to have pre-sense apply the brakes. I let it go to a point where I chicken out then slam on the brakes myself.
Is this normal operation? Why doesn't ACC ever detect the stopped car?
AudiWorld Member
Joined: Sep 2009
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You might want to share the year and the type of options that you have for other members to help.
As far as I know, ACC is good for cruise control. I believe newer ACC could come to complete stop in stop&go traffic. I am not sure if the older ACC (e.g. MY2013) has this. It's because it used to be ACC with braking guard - ACC would disengage if too slow, then braking guard will kick in, but then braking guard also has limitation of speed and deceleration.
Newer model/option seems no longer has braking guard, but has further defined pre-sense front/rear/side, where the pre-sense front could apply braking with some limitation of speed of vehicle.
Feel free to correct me if I am wrong.
As far as I know, ACC is good for cruise control. I believe newer ACC could come to complete stop in stop&go traffic. I am not sure if the older ACC (e.g. MY2013) has this. It's because it used to be ACC with braking guard - ACC would disengage if too slow, then braking guard will kick in, but then braking guard also has limitation of speed and deceleration.
Newer model/option seems no longer has braking guard, but has further defined pre-sense front/rear/side, where the pre-sense front could apply braking with some limitation of speed of vehicle.
Feel free to correct me if I am wrong.
AudiWorld Super User
Joined: Mar 2006
Posts: 7,382
Likes: 1,098
From: San Francisco Bay Area
No, ACC does not detect stationary objects. The system monitors moving objects and reacts if they slow down or come to a stop. For ACC to react to a stopped car ahead of you it first had to see the car moving and come to a stop. This is explained in the owner's manual. ACC is only adaptive cruise control that reacts to slowing cars ahead of you and maintains your speed or can bring the car to a stop if traffic ahead of you comes to a stop and resume once it's moving again, but it's not a system that keeps you from slamming into a wall, parked cars or cars ahead of you that were already stopped when they came in range.
Thread Starter
AudiWorld Member
Joined: Oct 2018
Posts: 186
Likes: 5
From: Wisconsin
You often see a car ad on TV of a child darting out from parked cars and the car auto-stopping.
I'm just trying to sort out how to tell which Audi's do or don't have this type of feature.
I really thought with ACC on it would be a no-brainer for the car to brake or stop no matter what large'ish object gets in front of the car.
AudiWorld Super User
Joined: Mar 2006
Posts: 7,382
Likes: 1,098
From: San Francisco Bay Area
2014 RS7 with every tech option available.
So the poster above you says stopped obstacles are not detected. You say new vehicles do with laser?
You often see a car ad on TV of a child darting out from parked cars and the car auto-stopping.
I'm just trying to sort out how to tell which Audi's do or don't have this type of feature.
I really thought with ACC on it would be a no-brainer for the car to brake or stop no matter what large'ish object gets in front of the car.
So the poster above you says stopped obstacles are not detected. You say new vehicles do with laser?
You often see a car ad on TV of a child darting out from parked cars and the car auto-stopping.
I'm just trying to sort out how to tell which Audi's do or don't have this type of feature.
I really thought with ACC on it would be a no-brainer for the car to brake or stop no matter what large'ish object gets in front of the car.
For your convenience:
AudiWorld Super User
Joined: Apr 2016
Posts: 4,830
Likes: 252
From: New Jersey
2014 RS7 with every tech option available.
So the poster above you says stopped obstacles are not detected. You say new vehicles do with laser?
You often see a car ad on TV of a child darting out from parked cars and the car auto-stopping.
I'm just trying to sort out how to tell which Audi's do or don't have this type of feature.
I really thought with ACC on it would be a no-brainer for the car to brake or stop no matter what large'ish object gets in front of the car.
So the poster above you says stopped obstacles are not detected. You say new vehicles do with laser?
You often see a car ad on TV of a child darting out from parked cars and the car auto-stopping.
I'm just trying to sort out how to tell which Audi's do or don't have this type of feature.
I really thought with ACC on it would be a no-brainer for the car to brake or stop no matter what large'ish object gets in front of the car.
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