Aggressive Emergency Braking
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Joined: Jun 2010
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2022 SL 55 AMG, 2020 AMG GT 53, 2015 GL 550
Aggressive Emergency Braking
So, I'm a spirited driver. I've noticed when doing a somewhat tight lane change this car loves to smash the brakes, choke me with the seatbelt and do it's best to get me killed or at least rear-ended. 😁 I have three Mercedes and none are aggressive as this. I'm wondering what setting do I need to adjust?
I already have lane keep assist turned off, having larger wheels I have to dodge potholes and being pushed back into my lane is annoying to say the least. But the panic mode my GT goes into when cutting a lane a bit tight is deadly.
I already have lane keep assist turned off, having larger wheels I have to dodge potholes and being pushed back into my lane is annoying to say the least. But the panic mode my GT goes into when cutting a lane a bit tight is deadly.
Out Of Control!!
Joined: Nov 2018
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From: San Francisco Bay Area
2019 C63CS
How tight are we talking? I don't have your specific car, but in my experience having driven different AMGs over the years and my own, the Active Brake Assist has never engaged unless there was legitimate reason. There might have been one false positive now that I'm thinking about. There are acoustic and visual warnings before the brakes engage. I'm also a very spirited driver and my AMG occasionally beeps at me when I'm cutting it too close for its comfort during a lane change, but it never slammed on the brakes. Are you using the turn signal when changing lanes and are you getting a warning or just slamming on the brakes? The brakes don't engage if you are deliberate on the throttle and with your steering inputs. It's supposed to recognize that you are evading the impending collision. Are you hesitating by any chance? There are no settings to adjust. The Active Brake Assist can be turned off temporarily, but it turns back on every time the engine is started. It also turns off if you fully turn off ESP.
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Senior Member
Joined: Jun 2010
Posts: 469
Likes: 123
2022 SL 55 AMG, 2020 AMG GT 53, 2015 GL 550
Good questions...
Valid questions.
Some of the lane changes are tight, where I live people don't always understand what the fast lane means. But a tight lane change depends on how you define it I guess.
My coupe used to do the same thing but I adjusted the setting and now I haven't had it do that at all. But I also recall my coupe beeping and alarming before slamming in the brakes.
This car unless I don't remember, will beep and the lane keep assist on the mirror will flash but no real warning it will just slam the brakes briefly until I complete the lane change, meanwhile whoever I got in front of either thinks I'm brake checking them or I can't drive.
I always use my turn signal. My wife laughs when I pull into our cul-de-sac using my turn signal. It's just second nature to me.
And to answer your other question. I never hesitate. I'm intentional with the lane change and I'm on the throttle with my turn signal.
I'm a spirited driver but a good one. Hesitation is never a good thing. My car however, has a mind if it's own. Even when it's not so tight it tries to smash the brakes briefly and it drives me crazy!
I've adjust a setting (can't remember which) to be less aggressive but either I did it backwards and made it more aggressive or I changed the wrong setting.
Some of the lane changes are tight, where I live people don't always understand what the fast lane means. But a tight lane change depends on how you define it I guess.
My coupe used to do the same thing but I adjusted the setting and now I haven't had it do that at all. But I also recall my coupe beeping and alarming before slamming in the brakes.
This car unless I don't remember, will beep and the lane keep assist on the mirror will flash but no real warning it will just slam the brakes briefly until I complete the lane change, meanwhile whoever I got in front of either thinks I'm brake checking them or I can't drive.
I always use my turn signal. My wife laughs when I pull into our cul-de-sac using my turn signal. It's just second nature to me.
And to answer your other question. I never hesitate. I'm intentional with the lane change and I'm on the throttle with my turn signal.
I'm a spirited driver but a good one. Hesitation is never a good thing. My car however, has a mind if it's own. Even when it's not so tight it tries to smash the brakes briefly and it drives me crazy!
I've adjust a setting (can't remember which) to be less aggressive but either I did it backwards and made it more aggressive or I changed the wrong setting.
Out Of Control!!
Joined: Nov 2018
Posts: 11,651
Likes: 5,469
From: San Francisco Bay Area
2019 C63CS
Valid questions.
Some of the lane changes are tight, where I live people don't always understand what the fast lane means. But a tight lane change depends on how you define it I guess.
My coupe used to do the same thing but I adjusted the setting and now I haven't had it do that at all. But I also recall my coupe beeping and alarming before slamming in the brakes.
This car unless I don't remember, will beep and the lane keep assist on the mirror will flash but no real warning it will just slam the brakes briefly until I complete the lane change, meanwhile whoever I got in front of either thinks I'm brake checking them or I can't drive.
I always use my turn signal. My wife laughs when I pull into our cul-de-sac using my turn signal. It's just second nature to me.
And to answer your other question. I never hesitate. I'm intentional with the lane change and I'm on the throttle with my turn signal.
I'm a spirited driver but a good one. Hesitation is never a good thing. My car however, has a mind if it's own. Even when it's not so tight it tries to smash the brakes briefly and it drives me crazy!
I've adjust a setting (can't remember which) to be less aggressive but either I did it backwards and made it more aggressive or I changed the wrong setting.
Some of the lane changes are tight, where I live people don't always understand what the fast lane means. But a tight lane change depends on how you define it I guess.
My coupe used to do the same thing but I adjusted the setting and now I haven't had it do that at all. But I also recall my coupe beeping and alarming before slamming in the brakes.
This car unless I don't remember, will beep and the lane keep assist on the mirror will flash but no real warning it will just slam the brakes briefly until I complete the lane change, meanwhile whoever I got in front of either thinks I'm brake checking them or I can't drive.
I always use my turn signal. My wife laughs when I pull into our cul-de-sac using my turn signal. It's just second nature to me.
And to answer your other question. I never hesitate. I'm intentional with the lane change and I'm on the throttle with my turn signal.
I'm a spirited driver but a good one. Hesitation is never a good thing. My car however, has a mind if it's own. Even when it's not so tight it tries to smash the brakes briefly and it drives me crazy!
I've adjust a setting (can't remember which) to be less aggressive but either I did it backwards and made it more aggressive or I changed the wrong setting.
Last edited by superswiss; Apr 12, 2025 at 01:45 AM.
Thread Starter
Senior Member
Joined: Jun 2010
Posts: 469
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2022 SL 55 AMG, 2020 AMG GT 53, 2015 GL 550
As I recall, there's only a setting for how early you get the warning, so I suppose if you set that to Late, then you don't have much time to adjust. I've set mine to whatever the medium setting is if I remember or it might be set to Early, so when I get the warning I must implicitly react and signal the car enough that I'm aware and steering around whatever it thinks I'm about to crash into. Many people misunderstand this setting and think it applies to the braking, so they set it to Late, but the correct setting is Early, so you get the acoustic warning ahead of time before it slams on the brake and you have time to signal the car that you are seeing the obstacle.
I remember with the coupe it was a bit of trial and error messing with the settings.
Out Of Control!!
Joined: Nov 2018
Posts: 11,651
Likes: 5,469
From: San Francisco Bay Area
2019 C63CS
https://www.mbusa.com/en/owners/manu...e-brake-assist
Thread Starter
Senior Member
Joined: Jun 2010
Posts: 469
Likes: 123
2022 SL 55 AMG, 2020 AMG GT 53, 2015 GL 550
Don't know which model year you have, but it's under Settings -> Assistance -> Collision Avoidance in MBUX and then press the gear next to Active Brake Assist and adjust the warning timing. See at the bottom of this page in the owner's manual:
https://www.mbusa.com/en/owners/manu...e-brake-assist
https://www.mbusa.com/en/owners/manu...e-brake-assist
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From: Kenilworth, il usa
GT63S ePerformance 4dr, '25 Bentayga Black Ed.(wife), Wrangler and 250 MLB(kids)
It is deadly!
You try to squeeze into a gap on a highway and the damn thing "thinks" you are too close to the car in front and slams on the brakes exactly at the moment you move in front of the car you are passing.
I religiously turn the thing off before even putting the car in drive, these mandatory "safety nannies" really went too far.........
You try to squeeze into a gap on a highway and the damn thing "thinks" you are too close to the car in front and slams on the brakes exactly at the moment you move in front of the car you are passing.
I religiously turn the thing off before even putting the car in drive, these mandatory "safety nannies" really went too far.........
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Thread Starter
Senior Member
Joined: Jun 2010
Posts: 469
Likes: 123
2022 SL 55 AMG, 2020 AMG GT 53, 2015 GL 550
It is deadly!
You try to squeeze into a gap on a highway and the damn thing "thinks" you are too close to the car in front and slams on the brakes exactly at the moment you move in front of the car you are passing.
I religiously turn the thing off before even putting the car in drive, these mandatory "safety nannies" really went too far.........
You try to squeeze into a gap on a highway and the damn thing "thinks" you are too close to the car in front and slams on the brakes exactly at the moment you move in front of the car you are passing.
I religiously turn the thing off before even putting the car in drive, these mandatory "safety nannies" really went too far.........
Out Of Control!!
Joined: Nov 2018
Posts: 11,651
Likes: 5,469
From: San Francisco Bay Area
2019 C63CS
It is deadly!
You try to squeeze into a gap on a highway and the damn thing "thinks" you are too close to the car in front and slams on the brakes exactly at the moment you move in front of the car you are passing.
I religiously turn the thing off before even putting the car in drive, these mandatory "safety nannies" really went too far.........
You try to squeeze into a gap on a highway and the damn thing "thinks" you are too close to the car in front and slams on the brakes exactly at the moment you move in front of the car you are passing.
I religiously turn the thing off before even putting the car in drive, these mandatory "safety nannies" really went too far.........
Last edited by superswiss; Apr 12, 2025 at 02:07 PM.
Thread Starter
Senior Member
Joined: Jun 2010
Posts: 469
Likes: 123
2022 SL 55 AMG, 2020 AMG GT 53, 2015 GL 550
Yes, at times. I had the emergency braking set to default and it did it all the time. Then I moved it to late. And it seemed to do it less. I'm starting to wonder if it's learning my driving patterns because while it still thinks to do it sometimes it's not happened as frequently. It's so hard to gauge what I'm doing when it happens.
My Scenarios:
I'm stuck in a lane with two cars moving at a similar pace, but there's a large enough gap that I can hop in and accelerate. This means I may hit the gas closing in on the car in front of me, then I'm still on the gas when switching lanes quickly. This scenario more than anything triggers it.
I'm flying around someone in the fast lane moving at a much higher rate of speed than both cars with the intent on making a quick swoop into the lane while never hitting the brake.
Either way, it's definitely made me a less "spirited" driver.
My Scenarios:
I'm stuck in a lane with two cars moving at a similar pace, but there's a large enough gap that I can hop in and accelerate. This means I may hit the gas closing in on the car in front of me, then I'm still on the gas when switching lanes quickly. This scenario more than anything triggers it.
I'm flying around someone in the fast lane moving at a much higher rate of speed than both cars with the intent on making a quick swoop into the lane while never hitting the brake.
Either way, it's definitely made me a less "spirited" driver.
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Joined: Dec 2019
Posts: 33,330
Likes: 6,607
Yes, at times. I had the emergency braking set to default and it did it all the time. Then I moved it to late. And it seemed to do it less. I'm starting to wonder if it's learning my driving patterns because while it still thinks to do it sometimes it's not happened as frequently. It's so hard to gauge what I'm doing when it happens.
My Scenarios:
I'm stuck in a lane with two cars moving at a similar pace, but there's a large enough gap that I can hop in and accelerate. This means I may hit the gas closing in on the car in front of me, then I'm still on the gas when switching lanes quickly. This scenario more than anything triggers it.
I'm flying around someone in the fast lane moving at a much higher rate of speed than both cars with the intent on making a quick swoop into the lane while never hitting the brake.
Either way, it's definitely made me a less "spirited" driver.
My Scenarios:
I'm stuck in a lane with two cars moving at a similar pace, but there's a large enough gap that I can hop in and accelerate. This means I may hit the gas closing in on the car in front of me, then I'm still on the gas when switching lanes quickly. This scenario more than anything triggers it.
I'm flying around someone in the fast lane moving at a much higher rate of speed than both cars with the intent on making a quick swoop into the lane while never hitting the brake.
Either way, it's definitely made me a less "spirited" driver.
