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2025 AMG G 63 SUV /// 2025 AMG GT 63 S E Performance 4 Door Coupé
Possible Active Steering Assist Issue?
Hey MBWorld!
I have a question/concern about Active Steering Assist on my W465 G63.
I live in Canada and make long journeys, so I appreciate Active Distance Assist DISTRONIC and Active Steering Assist. The Active Distance cruise control works great, but I’ve noticed the Steering Assist doesn’t.
When the system is on I notice that the vehicle gently but noticeably “bounces” between the lane markings. It drives in a zig zag pattern, not aggressively, but it’s noticeable and really annoying! It never drives in a straight line. I keep my hands/hand firmly on the wheel without tugging to one side or the other, I make sure all the sensors are clean and unobstructed, but it still does this.
My RS6 keeps the car straight as an arrow, the Tesla Plaid I used to have was straight as an arrow.
Has anyone else, in any newer model Merc or AMG with Active Distance Assist DISTRONIC and Active Steering Assist noticed this as well? Has anyone with a 2025 G noticed this?
I’m hoping this is a calibration issue because if it isn’t, IMO the steering assist is useless. Pretty sure it makes me look drunk to other drivers.
P.S. Please spare me the “just drive the vehicle yourself”, “I’d never let a computer be in charge of my safety”, “Shoulda got a 1979 Ford pickup with a 7.5 liter V8, seats made out of rusty knives and snake fangs, guns that shoot you if you even attempt to use the AC on a 120 degree day, and a speedometer that punches you in the face if you drive under 60MPH through a school zone like a real man!” comments.
The windshield glass also gets dirty on the inner side. You can clean that without any electronics skills. Don't scratch plastic lens while at it.
This whole navigation system can disfunction quietly without any direct error as in your case but you can really tell it's consistently working poorly between lanes markings.
Well worth half an hour of time.
Last edited by CaliBenzDriver; Apr 5, 2025 at 10:06 PM.
2025 AMG G 63 SUV /// 2025 AMG GT 63 S E Performance 4 Door Coupé
@CaliBenzDriver Thanks for the info! Your post made me think. I have a windshield protector installed, some sort of special glass-like PPF, could this affect the active steering?
@CaliBenzDriver Thanks for the info! Your post made me think. I have a windshield protector installed, some sort of special glass-like PPF, could this affect the active steering?
Yes... clearly!!
The windshield cameras and rain sensor are tuned to the windshield glass type. Replacement windshields require calibration.
Your stereo camera has a harder time to delineate contrast lines.
2025 AMG G 63 SUV /// 2025 AMG GT 63 S E Performance 4 Door Coupé
Originally Posted by CaliBenzDriver
Yes... clearly!!
The windshield cameras and rain sensor are tuned to the windshield glass type. Replacement windshields require calibration.
Your stereo camera has a harder time to delineate contrast lines.
Dangit all! I love the windshield protector! It’s like permanent RainX and a screen protector for a phone from all the gravel and sand up here. I’ll rip that thing off as soon as I can and report back.
Edit: I hope you’re right cause I love it and it was expensive. All the searches I’ve done say the film is so thin and the optical clarity so good that it doesn’t affect ADAS or cameras. If I get it removed and it still does it, I’m going to HUNT YOU DOWN and say to your FACE: Thanks for the recommendation, it was worth a try! Have a great day
Last edited by G63GT63SE; Apr 6, 2025 at 01:04 AM.
Dangit all! I love the windshield protector! It’s like permanent RainX and a screen protector for a phone from all the gravel and sand up here. I’ll rip that thing off as soon as I can and report back.
Edit: I hope you’re right cause I love it and it was expensive. All the searches I’ve done say the film is so thin and the optical clarity so good that it doesn’t affect ADAS or cameras. If I get it removed and it still does it, I’m going to HUNT YOU DOWN and say to your FACE: Thanks for the recommendation, it was worth a try! Have a great day
You know the world is non-binary especially these days.... why don't you cut out two slot windows from your film so cameras get a chance to see well.
I am sure a windshield protector is the way to go. These windshield glass chip like there's no tomorrow.
Last edited by CaliBenzDriver; Apr 6, 2025 at 04:43 AM.
The car already does drive straight even
without any fancy MFK or Distronic.
The electric rack speed sensitive function is virtually disabled by the solderless SCM.
I am sure many haven't noticed this function missing!
When it's working you can easily drive with one hand at any speed. The car stays put and tracks straight courtesy of steering column and steering rack working well together.
This is really comfortable on highway. The opposite is unstable chassis moved around easily.
Solderless quietly wasting performance from the first day.
2025 AMG G 63 SUV /// 2025 AMG GT 63 S E Performance 4 Door Coupé
Originally Posted by CaliBenzDriver
You know the world is non-binary especially these days.... why don't you cut out two slot windows from your film so cameras get a chance to see well.
I am sure a windshield protector is the way to go. These windshield glass chip like there's no tomorrow.
Naw I’m not going to try and cut holes in the protector. What you say about calibration makes sense. I’m going totally remove it and see if that fixes things.
If not I’ll take it to a bunch of dealers hoping one will say “that isn’t normal” because I’m pretty sure most of them will say it is normal.
I can already hear it… “It’s a driving aid, not self driving”
A driving aid that replicates drunk driving, sounds good!
@CaliBenzDriver solution from # 6 is quite remarkable, but I would check the tires/wheels or even alignment first as bouncing is not a software feature/bug even if the camera has visibility/networking issues. More likely bouncing starts when the system try to straightforward the vehicle, because of the alignment the system can consider that the driver does't keep the lane straight,
@CaliBenzDriver solution from # 6 is quite remarkable, but I would check the tires/wheels or even alignment first as bouncing is not a software feature/bug even if the camera has visibility/networking issues. More likely bouncing starts when the system try to straightforward the vehicle, because of the alignment the system can consider that the driver does't keep the lane straight,
You're saying Lane Assist is waving between lane markings
because of chassis alignment issue
where I am saying it's an MFK optical issue.
Read the specifics.... if the alignment is poor enough to cause instability then it should keep to one side without wandering and if it doesn't Distronic won't be top concern.
so not the control arms
not the faulty rack
not tie rods
but System performance.
There's no guarantee OP doesn't drive off curbs or potholes... Story does not hint to that now we know windshield's undercover.
Naw I’m not going to try and cut holes in the protector. What you say about calibration makes sense. I’m going totally remove it and see if that fixes things.
If not I’ll take it to a bunch of dealers hoping one will say “that isn’t normal” because I’m pretty sure most of them will say it is normal.
I can already hear it… “It’s a driving aid, not self driving”
A driving aid that replicates drunk driving, sounds good!
... Mercedes drunk driving aid ... LOL
experiment cutting film slots before pealing off film.
Look into the cameras to see if windshield + lens are foggy. They do get dirty even in clean driving environment.
Get this working well... you'll enjoy this every day in traffic stop and go or hwy cruising. It normally operates smoothly.
Clean sprayed durt from he back of the front radar plastic cover to increase radar sensitivity back to normal.
Last edited by CaliBenzDriver; Apr 6, 2025 at 06:31 AM.
OP state "I live in Canada and make long journeys", so I only thought about good quality highways, signalled, etc
When you activate Distronic with Steering Assyst, the system keeps as No1 priority the driver wish, so if driver wants to bounce, the car will bounce. Also if the vehicle alignment is wrong or the tires is old the system ( steering Assyst) will not differentiate the driver steering over the car steering and it will try to put the car in the middle of the lane, as the alignment will put the car outside the lane and so on.
Also, if Camera or radars is misaligned or foggy, ,the Germans engineers already wrote a lot of lines with code about even Fault Codes.
OP state "I live in Canada and make long journeys", so I only thought about good quality highways, signalled, etc
When you activate Distronic with Steering Assyst, the system keeps as No1 priority the driver wish, so if driver wants to bounce, the car will bounce. Also if the vehicle alignment is wrong or the tires is old the system ( steering Assyst) will not differentiate the driver steering over the car steering and it will try to put the car in the middle of the lane, as the alignment will put the car outside the lane and so on.
Also, if Camera or radars is misaligned or foggy, ,the Germans engineers already wrote a lot of lines with code about even Fault Codes.
That's possible he's dealing with networking fault combination and/or loose front end but that's not top of the list.
Obviously if the car doesn't drive straight "Lane Assist" is not going to make miracles.
The issue here is pinned on optical combined with poor highspeed networking.
Last edited by CaliBenzDriver; Apr 6, 2025 at 01:44 PM.
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Just drive the vehicle yourself.
I’d never let a computer be in charge of my safety.
Shoulda got a 1979 Ford pickup with a 7.5 liter V8, seats made out of rusty knives and snake fangs, guns that shoot you if you even attempt to use the AC on a 120 degree day, and a speedometer that punches you in the face if you drive under 60MPH through a school zone like a real man!
BUT, there is some legitimacy to looking for physical/mechanical problems. The vehicle is too new to need tires already (I'm guessing). However, if they have been changed, I would look closely at that. You may even try rotating them front to rear if they are all the same. I had a problem with my 2000 Ford F150 pulling right no matter what alignment was done. Then one day I decided to swap tires around and the problem disappeared. If this drifting problem has been there from the begining, maybe it's the tires.
When you had the screen protector put on the windshield, was the camera recailbrated?
If you turn off the Active Steering Assist and Active Distance Assist DISTRONIC, does the G-mobil wander?
2025 AMG G 63 SUV /// 2025 AMG GT 63 S E Performance 4 Door Coupé
Originally Posted by JettaRed
Just drive the vehicle yourself.
I’d never let a computer be in charge of my safety.
Shoulda got a 1979 Ford pickup with a 7.5 liter V8, seats made out of rusty knives and snake fangs, guns that shoot you if you even attempt to use the AC on a 120 degree day, and a speedometer that punches you in the face if you drive under 60MPH through a school zone like a real man!
I need that Ford!
The G drives PERFECTLY fine. Tires are brand new just like the truck, they are winters but it’s the winter wheel and tire package from Mercedes. Drives true and steers straight in all situations, including on the highway, when I hold the steering wheel straight I don’t have to adjust it at all during straight line travel. Turns and maneuvers without any problems. Lane Keep Assist works as intended with zero issues.
It’s perfect, except the Active Steering Assist with Distronic activated slowly makes the G drive in a zig zag pattern down the highway, even if I hold the steering wheel as tight as possible it still does it. During gentle curves and turns on the highway it doesn’t do this, only straight highway sections, which makes it all the more odd. Nothing too dangerous or jarring, but very annoying, to the point I don’t use the Active Steer anymore just the Distronic.
It’s not like the G is bouncing off the painted lane lines, it doesn’t get close enough too them for the Lane Keep to kick in, it just doesn’t drive in a straight line. After 10 or so kilometres it even makes you feel nauseous from gently weaving constantly.
There is windshield protection installed, the manufacturers website says it’s thin enough and has such high optical quality that ADAS’s aren’t affected. Plus wouldn’t this also make the Lane Keep Assist, rain sensing wipers, traffic sign recognition and Distronic vehicle speed adjustment based on visual input from speed limit signs also not work as intended?
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Originally Posted by G63GT63SE;
Plus wouldn’t this also make the Lane Keep Assist, rain sensing wipers, traffic sign recognition and Distronic vehicle speed adjustment based on visual input from speed limit signs also not work as intended?
Don’t know. I just have the dumb Distronic+ version.
I did disable the Active Lane Assist where the car jerks back into the lane if you approach the side markers. Now I get just the steering wheel vibration like rumble strips.
2025 AMG G 63 SUV /// 2025 AMG GT 63 S E Performance 4 Door Coupé
Originally Posted by JettaRed
Don’t know. I just have the dumb Distronic+ version.
I did disable the Active Lane Assist where the car jerks back into the lane if you approach the side markers. Now I get just the steering wheel vibration like rumble strips.
Ya it’s a totally different system on the new G’s thank goodness. Applying the brakes to a front wheel to get you away from a lane marking was ridiculous panic inducing nonsense. Every time I got into my last G I turned that off and the 360 camera when stopped in drive because I thought the little rear camera flap opening and closing so much would break it.
Just installed ExoShield on the windshield. Once I get some real world with the Nannies, I'll report back if I have any issues. It is so clear, I cannot see it causing any issue. TBD
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