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Active Brake Assist: Parking vs Driving

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Old Apr 10, 2024 | 07:25 PM
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Active Brake Assist: Parking vs Driving

I know there’s another thread that was just created but I am also experiencing issues while backing out of my garage. It would slam on the brakes occasionally while backing out due to what I assume are close proximity items like the garage itself.

My question is this: which setting actually triggers this because I see two settings that, at least to me, could possibly trigger them. What’s the difference between the two? Does one work only while under a certain speed because how does it know I’m manually parking versus just going slow?




Collision Avoidance Submenu





Parking assist submenu (maneuvering assist)

Last edited by Frenetic; Apr 10, 2024 at 07:48 PM.
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Old Apr 10, 2024 | 07:40 PM
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For backing out, the responsible settings would be Cross Traffic, Rear and probably Close-range Braking under the Maneuvering Assistance settings. I would recommend you turn on Drive-away Assist, which you currently have turned off. Drive-away Assist briefly reduces the speed to 1 mph if it detects a nearby obstacle instead of slamming on the brakes and bring the vehicle to a complete stop. I park fairly close to the wall in my garage. The parking sensors go nuts, but it never slams on the brakes and only keeps me from going faster than 1 mph, which is enough to ease out and past the garage door frame.
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Old Apr 10, 2024 | 08:14 PM
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What about the EARLY, MEDIUM, LATE one for collision avoidance? That doesn’t slam on the brakes near close objects while backing out? That was the suggestion made in the other thread.

If it is close-range braking, then it’s just all or nothing? There’s no way to turn down the sensitivity?
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Old Apr 10, 2024 | 09:07 PM
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Originally Posted by Frenetic
What about the EARLY, MEDIUM, LATE one for collision avoidance? That doesn’t slam on the brakes near close objects while backing out? That was the suggestion made in the other thread.

If it is close-range braking, then it’s just all or nothing? There’s no way to turn down the sensitivity?
Nope, that's for forward collisions.
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Old Apr 12, 2024 | 10:34 AM
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I tried drive-away assist and did not like it. If I pull up to a house near a rounded curb off to the side, it will go off almost every time, preventing me to drive away when there is in fact absolutely nothing in front of me.
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Old Apr 12, 2024 | 11:59 AM
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Originally Posted by Frenetic
I tried drive-away assist and did not like it. If I pull up to a house near a rounded curb off to the side, it will go off almost every time, preventing me to drive away when there is in fact absolutely nothing in front of me.
What's a rounded curb? Do you mean a roll curb? I haven't run into this issue. My driveway has a roll curb similar to the one shown below with a gutter. I have to take it at an angle with my AMG as not to scrape, but otherwise I've had no issues even with recent loaners such as an S 500.





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Old Apr 12, 2024 | 02:13 PM
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Yes, that curb. If I parallel to this type of curb, with the wheels in the gutter, it will prevent me from pulling away.
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Old Apr 12, 2024 | 02:42 PM
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Originally Posted by Frenetic
Yes, that curb. If I parallel to this type of curb, with the wheels in the gutter, it will prevent me from pulling away.
That's odd. I often pull up parallel to mine with the wheels in the gutter, and never experienced this. Even if it reacted to it, it should only limit your speed to 1 mph and not prevent you from pulling away altogether. Something doesn't seem right.
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Old Apr 12, 2024 | 03:27 PM
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Yes, that “prevent” I’m talking about is the 1 MPH.
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Old Apr 12, 2024 | 03:33 PM
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Originally Posted by Frenetic
Yes, that “prevent” I’m talking about is the 1 MPH.
Oh ok. Assuming you are steering away from the curb, it should quickly lift the 1 mph restriction. As said above, the restriction regularly kicks in for me while backing out of my garage, but as soon as the rear clears the garage door, it lifts the restriction immediately. It's not like I'm backing out much faster than 1 mph anyway. Even pulling away from a curb I'm guessing I'm not exceeding 1-2 mph until I clear the curb and am sure nobody is suddenly bombing past me, or a kid running out into the street.
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Old Apr 12, 2024 | 04:19 PM
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No, I’m not turning right to go left, lol. But, it’s reproducible every time. I just tried again and parked even farther away from the curb. Same thing.
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Old Apr 12, 2024 | 04:28 PM
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Originally Posted by Frenetic
No, I’m not turning right to go left, lol.
Not what I was getting at. I was wondering if this happens if you drive parallel to the curb with the wheels straight vs actually steering away from the curb.
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Old Apr 12, 2024 | 04:33 PM
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I’m driving at a slight angle away from the curb. Even if I was driving parallel to it, should it go off? Because my car alarms in both situations.

Also, the braking that I experience backing out of the garage is the “Close-Range” braking feature because I finally paid attention to the message that popped up when it happens. I ended up just turning it off.
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Old Apr 12, 2024 | 04:44 PM
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Originally Posted by Frenetic
I’m driving at a slight angle away from the curb. Even if I was driving parallel to it, should it go off? Because my car alarms in both situations.
Well, if you are driving parallel to it, then you are not increasing the distance to the obstacle, so no I would expect it to keep limiting the speed. Try pulling away at a bigger angle to see if that makes a difference.
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Old Apr 13, 2024 | 07:30 AM
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Yeah my car reacts negatively to that rolled curb no matter what steering angle away. It’s the initial nearby proximity that is triggering it. It will release quicker if I turn away but it’s there at the start and I could be a foot away from that curb to begin with. I had to turn it back off.
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