cruise control shenanigans . . .
Thread Starter
Senior Member
Joined: Apr 2004
Posts: 300
Likes: 84
From: Idaho
'19 E63S
cruise control shenanigans . . .
Just got back from a road trip and noticed a little issue with cruise control . . . I'm driving along on cc going about 90mph 'ish and all of a sudden car slows down significantly and locks in @ 40 mph (no traffic in sight). Sometimes it slows down to 50 mph, it varies . . . bottom line is, it locks in at a significantly lower speed without any intention on my part to do so. Anybody else have had that issue? Is there anything I'm missing?
MBWorld Fanatic!
Joined: Mar 2019
Posts: 1,256
Likes: 515
From: USA
2018 E63S Wagon, 2017 Z51 Corvette
There's a setting where it will adjust cruise speed to match the current speed limit. I turned mine off. I noticed once when in heavy traffic @ approx 75mph the HUD suddenly showed the limit as 25MPH. As I was next to a semi with another behind me a sudden slow down could have ended my timeline quickly.
Thread Starter
Senior Member
Joined: Apr 2004
Posts: 300
Likes: 84
From: Idaho
'19 E63S
There's a setting where it will adjust cruise speed to match the current speed limit. I turned mine off. I noticed once when in heavy traffic @ approx 75mph the HUD suddenly showed the limit as 25MPH. As I was next to a semi with another behind me a sudden slow down could have ended my timeline quickly.
MBWorld Fanatic!
Joined: May 2017
Posts: 1,725
Likes: 604
From: Southern California
2018 E63S AMG
Yeah, there is a setting in there for speed limit adoption.
Saved my bacon a number of times during the European Delivery trip where there were frequent speed limit changes and often times when we didn't see the sign. With cameras everywhere we would have been nailed for sure many times instead of just once.
But on the highways in the US it can be really annoying when there are frontage roads within view of the camera. The worst was tooling along at 95 MPH in Texas where the speed limit was 85 MPH then having the car slam on the brakes and drop the programmed speed to 35 MPH or 40 MPH because of a frontage road parallel to the interstate.
Turned the feature off pretty quickly after that for the rest of the drive.
Saved my bacon a number of times during the European Delivery trip where there were frequent speed limit changes and often times when we didn't see the sign. With cameras everywhere we would have been nailed for sure many times instead of just once.
But on the highways in the US it can be really annoying when there are frontage roads within view of the camera. The worst was tooling along at 95 MPH in Texas where the speed limit was 85 MPH then having the car slam on the brakes and drop the programmed speed to 35 MPH or 40 MPH because of a frontage road parallel to the interstate.
Turned the feature off pretty quickly after that for the rest of the drive.
Out Of Control!!
Joined: Nov 2018
Posts: 11,400
Likes: 5,324
From: San Francisco Bay Area
2019 C63CS
Yeah, there is a setting in there for speed limit adoption.
Saved my bacon a number of times during the European Delivery trip where there were frequent speed limit changes and often times when we didn't see the sign. With cameras everywhere we would have been nailed for sure many times instead of just once.
But on the highways in the US it can be really annoying when there are frontage roads within view of the camera. The worst was tooling along at 95 MPH in Texas where the speed limit was 85 MPH then having the car slam on the brakes and drop the programmed speed to 35 MPH or 40 MPH because of a frontage road parallel to the interstate.
Turned the feature off pretty quickly after that for the rest of the drive.
Saved my bacon a number of times during the European Delivery trip where there were frequent speed limit changes and often times when we didn't see the sign. With cameras everywhere we would have been nailed for sure many times instead of just once.
But on the highways in the US it can be really annoying when there are frontage roads within view of the camera. The worst was tooling along at 95 MPH in Texas where the speed limit was 85 MPH then having the car slam on the brakes and drop the programmed speed to 35 MPH or 40 MPH because of a frontage road parallel to the interstate.
Turned the feature off pretty quickly after that for the rest of the drive.
Trending Topics
Thread Starter
Senior Member
Joined: Apr 2004
Posts: 300
Likes: 84
From: Idaho
'19 E63S
been coming up empty handed in regards to how to turn that off. Don't really know what to search for . . . never mind, found it! Thanks for help tracking that option down!
Last edited by sixfive; Jun 2, 2021 at 09:18 PM.
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
MBWorld Fanatic!
Joined: Mar 2019
Posts: 1,256
Likes: 515
From: USA
2018 E63S Wagon, 2017 Z51 Corvette
In the situation I mentioned above there was no frontage road. It may have interpreted something on the side of the semi I was next to, my attention was on the road and not what was written on it. Regardless, the concept is good but the implementation can be problematical.
Out Of Control!!
Joined: Nov 2018
Posts: 11,400
Likes: 5,324
From: San Francisco Bay Area
2019 C63CS
Just imagine, the EU had proposed to make Intelligent Speed Assistance (ISA) a mandatory feature on cars sold in Europe. This system was supposed to act as a speed limitier and automatically reduce a vehicle's speed by limiting engine power, so not allowing somebody to drive faster than the speed limit. They reversed their plans, though, exactly because these systems are not foolproof when it comes to reading the speed limit signs. What's gonna be mandatory in Europe soon is the part of the system that warns the driver if they drive faster than the speed limit like the MB system already does if turned on. If you drive faster than the speed limit the speed limit sign in the instrument cluster blinks periodically. You can configure it to how many mph over the speed limit you want the warning or turn it off.
Newbie
Joined: May 2021
Posts: 3
Likes: 0
C43
Just imagine, the EU had proposed to make Intelligent Speed Assistance (ISA) a mandatory feature on cars sold in Europe. This system was supposed to act as a speed limitier and automatically reduce a vehicle's speed by limiting engine power, so not allowing somebody to drive faster than the speed limit. They reversed their plans, though, exactly because these systems are not foolproof when it comes to reading the speed limit signs. What's gonna be mandatory in Europe soon is the part of the system that warns the driver if they drive faster than the speed limit like the MB system already does if turned on. If you drive faster than the speed limit the speed limit sign in the instrument cluster blinks periodically. You can configure it to how many mph over the speed limit you want the warning or turn it off.
Just trying to figure how to avoid becoming automatically compliant with laws that will require the ISA. 'm guessing if your car has an ISA in it, they will require it's full use when it becomes law, so looking for a permanent work around - or are there tuners who can properly and permanently disable the software?
Out Of Control!!
Joined: Nov 2018
Posts: 11,400
Likes: 5,324
From: San Francisco Bay Area
2019 C63CS
So where are the "eyes" (camera) that read these signs? Can we cover them with tape so they can't see anything?
Just trying to figure how to avoid becoming automatically compliant with laws that will require the ISA. 'm guessing if your car has an ISA in it, they will require it's full use when it becomes law, so looking for a permanent work around - or are there tuners who can properly and permanently disable the software?
Just trying to figure how to avoid becoming automatically compliant with laws that will require the ISA. 'm guessing if your car has an ISA in it, they will require it's full use when it becomes law, so looking for a permanent work around - or are there tuners who can properly and permanently disable the software?
Last edited by superswiss; Feb 2, 2022 at 08:23 PM.
Joined: Jul 2006
Posts: 6,760
Likes: 594
From: Seattle
'19 E63S, ‘16 CLS63 RIP, '09 E63 Gone, '06 M5 Gone, '97 Supra TT Gone
