Brake Assist = Bloody Dangerous
05-14-2018, 09:07 PM
#1
Junior Member
Thread Starter
Brake Assist = Bloody Dangerous
2018 E63S Wagon; car was set to "medium" brake assist (default from when I picked up the car). On the drive home I was accelerating hard between the right lane, into the left lane - passing through a middle lane. Yes there were cars around, but fairly large gaps between them. As I squeeze between the cars in the middle lane (not much of a squeeze, really) and get into my left lane I suddenly feel the seat belt tighten and the car slams on the brakes. There was nothing - NOTHING - in the left lane; my guess is that the car assumed I was going to hit a car in the middle lane. The car skidded briefly... The guy approaching me from behind in the left lane had to slam on his brakes. Bloody dangerous, if you ask me. Have promptly set the assist to "off" following that incident. YMMV!
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Jcwalsh (06-10-2018)
05-14-2018, 09:26 PM
#2
MBWorld Fanatic!
Shouldn't do that if you are still on the gas, but if you were coasting and still closing in on the car you cut across, yes it was doing what it's supposed to.
In theory it watches the rear sensors to ensure there isn't a car right behind you that will hit you when it brakes, but from a legal sense that responsibilty is on the driver of that car to have a reasonable following distance and speed. The car can stop very hard and most people aren't expecting it, so yes it can be dangerous.
In theory it watches the rear sensors to ensure there isn't a car right behind you that will hit you when it brakes, but from a legal sense that responsibilty is on the driver of that car to have a reasonable following distance and speed. The car can stop very hard and most people aren't expecting it, so yes it can be dangerous.
05-14-2018, 10:12 PM
#5
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2014 E63S; AMS 100 octane ecu tune; edok tcu tune; BB intakes; dyno tuned
Cars were meant to be driven by drivers not by the car itself. Disable the nannies and drive your car!
i can tell you and admit that my wife had her suv rear ended by a brand new gl550 with a woman texting and the auto braking (in the other lady's Benz) saved our car from being totaled and the occupants (my family) from being badly injured. Lady admitted she was texting !!
be safe, glad you're ok
i can tell you and admit that my wife had her suv rear ended by a brand new gl550 with a woman texting and the auto braking (in the other lady's Benz) saved our car from being totaled and the occupants (my family) from being badly injured. Lady admitted she was texting !!
be safe, glad you're ok
Last edited by PeterUbers; 05-14-2018 at 10:31 PM.
05-14-2018, 10:59 PM
#7
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2018 E63S AMG
I have had the auto brake activate a few times. But only once has is it done the full yank the seat belt and prepare for impact routine.
In that instance I was charging pretty hard towards an intersection in the right hand turn lane as a light was getting ready to change. I was already braking fairly hard but had everything well in hand. Apparently the E63 sensed that the car in front of me, which was also turning and almost out of the way, was going to be hit, so the car "helpfully" applied even more braking and went into prepare for crash mode. Quite a surprise I'll say.
A few other times when I've been doing some aggressive lane changes with not a huge amount of room it has beeped and lightly applied a dash of brakes - kind of like the lane departure warning thing it does. But never like the full on battle stations mode above.
But I keep the nannies on in case I fall asleep during my daily commute to work and what not.
In that instance I was charging pretty hard towards an intersection in the right hand turn lane as a light was getting ready to change. I was already braking fairly hard but had everything well in hand. Apparently the E63 sensed that the car in front of me, which was also turning and almost out of the way, was going to be hit, so the car "helpfully" applied even more braking and went into prepare for crash mode. Quite a surprise I'll say.
A few other times when I've been doing some aggressive lane changes with not a huge amount of room it has beeped and lightly applied a dash of brakes - kind of like the lane departure warning thing it does. But never like the full on battle stations mode above.
But I keep the nannies on in case I fall asleep during my daily commute to work and what not.
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05-15-2018, 02:24 AM
#8
It actually saved me once to be honest and I am the kind of person who doesn't like the drive assist or any auto drive. I was in a light traffic, and I went to look at my phone for a split second and the guy in front of me slammed his break. The car beeped like 2-3 time and I had time to break but I guess it would of brake it self if I didnt
05-15-2018, 10:59 AM
#9
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2020 Audi R8 V10, 2016 AMG GTS, 2018 E63S Edition 1, 2018 Porsche GTS Cab, 2012 C63 BS
Yes it will at the most extreme levels (so very very rarely) and I can live with that. What I dont want is for The Rise of the Machines.
Last edited by Vic55; 05-15-2018 at 11:30 AM.
05-15-2018, 02:24 PM
#10
Former Vendor of MBWorld
Have the premium driver package? That could be the active lane assist... buttons to left of steering wheel
05-15-2018, 10:28 PM
#11
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2018 S560 and 2019 E450 Wagon.
I leave active lane keeping assist off, I don't like that one, pretty much everything else is on, have had no problems in 7500 miles yet.
05-17-2018, 10:57 PM
#12
Junior Member
Anyway to disable brake assist permanently? I deactivated it under vehicle settings but every time I start the car it turns back on automatically. Can't stand it. Any help appreciated.
Thanks!
Thanks!
05-18-2018, 11:55 PM
#13
I agree with Shahul... It is the Active Lane Assist. I HATE it. My Audi would vibrate the wheel. That is fine. This thing slams the brakes. If I go into a left turn merge lane at over 40, crossing the hash lines a little, it rams the brakes. Really bad feature. Mercedes should have a setting where there is no brake input to guide you back. Argh.
05-21-2018, 05:42 PM
#14
MBWorld Fanatic!
I agree with Shahul... It is the Active Lane Assist. I HATE it. My Audi would vibrate the wheel. That is fine. This thing slams the brakes. If I go into a left turn merge lane at over 40, crossing the hash lines a little, it rams the brakes. Really bad feature. Mercedes should have a setting where there is no brake input to guide you back. Argh.
05-21-2018, 08:40 PM
#16
05-21-2018, 10:43 PM
#17
Senior Member
Well, I was in full agreement with you all until today. This feature's annoyed me and violently grabbed me and slammed on the brakes for (IMO) no good reason quite a few times... but today, it saved my **** (or rather the car's front end). I have to cut it a little slack as a result...
05-22-2018, 06:06 AM
#18
MBWorld Fanatic!
According to this feature description, it shouldn't give you a warning and/or activate if your turn signals are active.
Btw. It is annoying but is saved my **** at least two times already. But I remember once it slammed on brakes on a peaceful stretch of road at 30mph when I was trying to swerve gently as a courtesy to cyclists. Definitely a shock to me and my passengers. Taught me to use blinkers even when no other cars are around
Btw. It is annoying but is saved my **** at least two times already. But I remember once it slammed on brakes on a peaceful stretch of road at 30mph when I was trying to swerve gently as a courtesy to cyclists. Definitely a shock to me and my passengers. Taught me to use blinkers even when no other cars are around
05-22-2018, 08:26 PM
#20
Brake assist has not given me any issues at all. My issue is the Active Lane Assist. Even the most insignificant touching of the line by the wheels may result in the brakes being applied to the opposing side in an effort to put you back in center. Even when there is zero traffic on the road. It also applies the brakes if you cut across the lines entering a left turn lane doing 40 more. We have a ton of these here and the smooth line sometimes takes you across the lines a little. Only when there is no traffic. Still, it slams the brakes on. So, for me, it will remain off unless I am using the cruise control late at night. I consider myself an excellent driver with no accidents in over 20 years. I don't need the car slamming on the brakes when my tire touches a line in the road! No defense for this. Please refrain from any attacks on me for saying this. It has no place in the car, there should be a low sensitivity setting that does not apply the brakes. Like my Audi S6 had!!
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mmmamg (05-22-2018)
05-22-2018, 10:04 PM
#21
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2018 E63S AMG
I agree WRT the lane assist. It is too sensitive in my view. Other cars that I have or have driven just beep first to warn you. Would be nice if the Merc gave you a few seconds worth of beep before going to the brakes.
I did recently get to experience the brake assist activating as I was somewhat aggressively making a lane change through a gap in traffic. Granted I was closing somewhat quickly on the car in front and accelerating to clear the car to my left as I made the lane change, but it wasn't really that aggressive. Not sure if the brake lights turn on when the brake assist activates but if so I feel kind of bad for visually brake checking the driver I was passing even though I was on the throttle.
If the gap had been really tight, I could see how it might result in a potential collision with the car behind that you're attempting to pass.
I did recently get to experience the brake assist activating as I was somewhat aggressively making a lane change through a gap in traffic. Granted I was closing somewhat quickly on the car in front and accelerating to clear the car to my left as I made the lane change, but it wasn't really that aggressive. Not sure if the brake lights turn on when the brake assist activates but if so I feel kind of bad for visually brake checking the driver I was passing even though I was on the throttle.
If the gap had been really tight, I could see how it might result in a potential collision with the car behind that you're attempting to pass.
05-22-2018, 10:37 PM
#22
MBWorld Fanatic!
Brake assist has not given me any issues at all. My issue is the Active Lane Assist. Even the most insignificant touching of the line by the wheels may result in the brakes being applied to the opposing side in an effort to put you back in center. Even when there is zero traffic on the road. It also applies the brakes if you cut across the lines entering a left turn lane doing 40 more. We have a ton of these here and the smooth line sometimes takes you across the lines a little. Only when there is no traffic. Still, it slams the brakes on. So, for me, it will remain off unless I am using the cruise control late at night. I consider myself an excellent driver with no accidents in over 20 years. I don't need the car slamming on the brakes when my tire touches a line in the road! No defense for this. Please refrain from any attacks on me for saying this. It has no place in the car, there should be a low sensitivity setting that does not apply the brakes. Like my Audi S6 had!!
05-22-2018, 10:39 PM
#23
MBWorld Fanatic!
I agree WRT the lane assist. It is too sensitive in my view. Other cars that I have or have driven just beep first to warn you. Would be nice if the Merc gave you a few seconds worth of beep before going to the brakes.
I did recently get to experience the brake assist activating as I was somewhat aggressively making a lane change through a gap in traffic. Granted I was closing somewhat quickly on the car in front and accelerating to clear the car to my left as I made the lane change, but it wasn't really that aggressive. Not sure if the brake lights turn on when the brake assist activates but if so I feel kind of bad for visually brake checking the driver I was passing even though I was on the throttle.
If the gap had been really tight, I could see how it might result in a potential collision with the car behind that you're attempting to pass.
I did recently get to experience the brake assist activating as I was somewhat aggressively making a lane change through a gap in traffic. Granted I was closing somewhat quickly on the car in front and accelerating to clear the car to my left as I made the lane change, but it wasn't really that aggressive. Not sure if the brake lights turn on when the brake assist activates but if so I feel kind of bad for visually brake checking the driver I was passing even though I was on the throttle.
If the gap had been really tight, I could see how it might result in a potential collision with the car behind that you're attempting to pass.
If you are cutting it that close that the system could cause a crash, you are already driving too "aggressively". The assist systems are horrible in aggressive Miami traffic, everybody drives like a maniac and if you let the car drive the way it wants, you will just get pushed around.
05-22-2018, 10:45 PM
#24
05-24-2018, 11:03 PM
#25
Junior Member
Thread Starter
I've had zero issues with active lane assist to my knowledge. The car never seems to brake when I cross white lines, irrespectibe of whether I use the turn signal or not. And it is active, so I'm not sure whether my issue is brake assist or lane assist.
