Notices
S-Class (W222) 2014-2020

Surprise Dashboard Warnings

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Mar 20, 2023 | 01:09 PM
  #1  
jlewis108's Avatar
Thread Starter
Newbie
 
Joined: May 2016
Posts: 5
Likes: 2
2015 S550
Surprise Dashboard Warnings

I posted this on the S63 forum:
​​​​​​I have a 2020 S63 with 30k and no issues until yesterday. When I started up, 3 warnings popped up on the dash screen.
Active Brake Assist Functions Limited
Active Lane Keeping Assist Inoperative
Active Blind Spot Warning Inoperative
The car has had no issues in the 2 years since new. I have an appointment with the dealer, but would appreciate any advice. Bad sensor? Weak battery? Software?
Reply
Old Mar 20, 2023 | 01:37 PM
  #2  
vinflouen's Avatar
Super Member
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2009
Posts: 566
Likes: 261
From: In The Woods
2019 W222 S560 4Matic/2025 Yukon Denali
Probably frost on sensors
Reply
Old Mar 20, 2023 | 02:44 PM
  #3  
jlewis108's Avatar
Thread Starter
Newbie
 
Joined: May 2016
Posts: 5
Likes: 2
2015 S550
It's been sunny, mid-50s in South Carolina. Made sure that the sensors are clean.
Reply
Old Mar 20, 2023 | 03:03 PM
  #4  
MBGuy2022's Avatar
Member
Photogenic
Liked
Loved
Community Favorite
 
Joined: Jun 2022
Posts: 224
Likes: 121
From: Southwest Florida
2019 S560 4MATIC Sedan
Probably a bad sensor in one of the bumpers or camera behind the inside mirror since it came on when the vehicle was started.
Reply
Old Mar 20, 2023 | 03:15 PM
  #5  
S_W222's Avatar
MBWorld Fanatic!
Community Builder
Liked
Loved
Community Favorite
 
Joined: Sep 2019
Posts: 3,154
Likes: 1,529
From: U.S.
Current/Last 5-years:GLS;G70;Alpina B8;X7;Accord. Sold:X7,TeslaS;S560;S550,X5;530e;L.Navigator;LS460
When I see (multiple warnings), I usually get optimistic that it maybe related to one (single) isolated sensor issue.
Reply
Old Mar 20, 2023 | 04:29 PM
  #6  
Grandpa Bee's Avatar
Junior Member
Liked
Loved
 
Joined: Dec 2022
Posts: 28
Likes: 15
From: Oregon
2014 S550 4Matic, 2015 ML400 4Matic, 2019 E450 4Matic Wagon
I had those issues on my 2014 S550 and it turned out to be a weak auxiliary battery. Replaced the battery and the warnings went away.
Reply
Old Mar 20, 2023 | 06:14 PM
  #7  
carlosinseattle's Avatar
MBWorld Fanatic!
15 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Aug 2007
Posts: 1,844
Likes: 797
From: Pacific Northwest
2001 S600 V12 Sold, 2011 Jaguar XFR Sold, 2017 S550 4-Matic, 2018 S63 AMG Sedan
Definitely low voltage issues when they all come on sumultaneously.
Reply
Old Mar 20, 2023 | 08:51 PM
  #8  
bishop64's Avatar
Super Member
 
Joined: Nov 2021
Posts: 893
Likes: 397
From: Hong Kong, China
2021 S450 4Matic
Originally Posted by jlewis108
I posted this on the S63 forum:
​​​​​​I have a 2020 S63 with 30k and no issues until yesterday. When I started up, 3 warnings popped up on the dash screen.
Active Brake Assist Functions Limited
Active Lane Keeping Assist Inoperative
Active Blind Spot Warning Inoperative
The car has had no issues in the 2 years since new. I have an appointment with the dealer, but would appreciate any advice. Bad sensor? Weak battery? Software?
Check the tyre pressures. Adjust if necessary. Reset them as 'reference value', if these warnings do not go away even after pressure adjustment.
Reply
MB World Stories

The Best of Mercedes & AMG

story-0

New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know

 Verdad Gallardo
story-1

6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

 Verdad Gallardo
story-2

Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

 Verdad Gallardo
story-3

Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

 Verdad Gallardo
story-4

8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-5

Flawlessly Restored Mercedes 190E Evo II Heads to Auction

 Verdad Gallardo
story-6

Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

 Verdad Gallardo
story-7

Mercedes EQS Gets A Major Update: Everything You Need to Know

 Verdad Gallardo
story-8

5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

 Verdad Gallardo
story-9

Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

 Verdad Gallardo
Old Mar 21, 2023 | 08:26 PM
  #9  
Denis Osullivan's Avatar
Member
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Feb 2021
Posts: 204
Likes: 52
From: Lower Westchester, NY
2018 s560v4
Originally Posted by jlewis108
I posted this on the S63 forum:
​​​​​​I have a 2020 S63 with 30k and no issues until yesterday. When I started up, 3 warnings popped up on the dash screen.
Active Brake Assist Functions Limited
Active Lane Keeping Assist Inoperative
Active Blind Spot Warning Inoperative
The car has had no issues in the 2 years since new. I have an appointment with the dealer, but would appreciate any advice. Bad sensor? Weak battery? Software?
This happened on my car. Xentry showed it was a bad sensor module in the rear bumper.
Reply
Old Feb 3, 2024 | 08:15 PM
  #10  
Joshua's Avatar
Member
 
Joined: Apr 2007
Posts: 120
Likes: 19
Originally Posted by Denis Osullivan
This happened on my car. Xentry showed it was a bad sensor module in the rear bumper.
Hello Dennis, can you help please.

What did they mean by a "bad sensor Module in the rear bumper".

I have an S560 (In Australia) and recently had 3 warnings after someone bumped my rear bumper corner in a car park. Quite a hard bum looking at the damage on their car compared to just paint scratches on mine).

Did you mean a sensor (as in rear parking sensor) or was it the rectangular radar control module that connects to the actual 4 sensors on the back bumper ?

Thanks
Reply
Old Feb 3, 2024 | 08:42 PM
  #11  
Denis Osullivan's Avatar
Member
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Feb 2021
Posts: 204
Likes: 52
From: Lower Westchester, NY
2018 s560v4
[QUOTE=Joshua;8918341]Hello Dennis, can you help please.

What did they mean by a "bad sensor Module in the rear bumper".

I have an S560 (In Australia) and recently had 3 warnings after someone bumped my rear bumper corner in a car park. Quite a hard bum looking at the damage on their car compared to just paint scratches on mine).

Did you mean a sensor (as in rear parking sensor) or was it the rectangular radar control module that connects to the actual 4 sensors on the back bumper ?

Thanks[/QUOTE
It’s the modular that’s in the bumper. It’s held in there in a bracket that seems to be brittle and breaks and creates the module to move and shift.
The dealer changed the modular but still had the messages. Then they took the bumper off the second time and duct taped the module to the bumper to make a more secure fit.
My guess is that the modular is no longer making good contact with the bumper.
Good Luck.
Reply
Old Feb 3, 2024 | 09:50 PM
  #12  
Joshua's Avatar
Member
 
Joined: Apr 2007
Posts: 120
Likes: 19
[QUOTE=Denis Osullivan;8918352]
Originally Posted by Joshua
Hello Dennis, can you help please.

What did they mean by a "bad sensor Module in the rear bumper".

I have an S560 (In Australia) and recently had 3 warnings after someone bumped my rear bumper corner in a car park. Quite a hard bum looking at the damage on their car compared to just paint scratches on mine).

Did you mean a sensor (as in rear parking sensor) or was it the rectangular radar control module that connects to the actual 4 sensors on the back bumper ?

Thanks[/QUOTE
It’s the modular that’s in the bumper. It’s held in there in a bracket that seems to be brittle and breaks and creates the module to move and shift.
The dealer changed the modular but still had the messages. Then they took the bumper off the second time and duct taped the module to the bumper to make a more secure fit.
My guess is that the modular is no longer making good contact with the bumper.
Good Luck.
thank you for the quick response.

i believe you may be right.

my car did have a knock in a car park at the passenger rear bumper corner.

it helps me narrow things down.

much appreciated and I will circle back with what my solutions turns out to be.
Reply

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 02:00 AM.

story-0
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know

Slideshow: Mercedes-AMG's new electric GT 4-Door Coupe trades combustion for software, synthetic noise, and more than 1,100 horsepower.

By Verdad Gallardo | 2026-05-20 20:08:15


VIEW MORE
story-1
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-2
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-3
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-4
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-5
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-6
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-7
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-8
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-9
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE