Speedlimit Assist
Thread Starter
MBWorld Fanatic!
Joined: Feb 2010
Posts: 1,519
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'25 S63 AMG E Performance, '26 CLE 53 AMG
Speedlimit Assist
Does anyone know how the speed limit gets adjusted on the heads-up display, instrument cluster and COMAND in the US for the SPEED LIMIT ASSIST feature?
There appears to be conflicting information as to how that gets updated. Some info. I have read states that it actually reads the road sign speed limit signs as a primary source while it uses as a backup the navigation map data. While other info I have read states that in the US it does not read the signs but rather just uses the navi map data.
In PA beginning in May, our interstate highway speeds were raised from 65 mph to 70 mph. I have determined that my car does not read the signs but uses only the data from the mapping software. So in order for the speedlimits in Speedlimit Assist to be updated one must get the map updated in COMAND.
Does anyone else have any experience with this?
There appears to be conflicting information as to how that gets updated. Some info. I have read states that it actually reads the road sign speed limit signs as a primary source while it uses as a backup the navigation map data. While other info I have read states that in the US it does not read the signs but rather just uses the navi map data.
In PA beginning in May, our interstate highway speeds were raised from 65 mph to 70 mph. I have determined that my car does not read the signs but uses only the data from the mapping software. So in order for the speedlimits in Speedlimit Assist to be updated one must get the map updated in COMAND.
Does anyone else have any experience with this?
Junior Member
Joined: Sep 2016
Posts: 26
Likes: 2
S550
Does anyone know if this feature can be retrofitted into a 2015? Again, I have one dealer that tells me it is just a navigation update of which I have yet to do and another dealer telling me no. I drove a 2016 loaner and really like the feature. It seems like it would just be software related. No?
Super Member
Joined: Dec 2014
Posts: 819
Likes: 184
From: New England/Florida
2005 SL 500. 2015 S550. 2016 GLE400 2018 S560
From my understanding it can not be retrofitted onto the 2015 version. It is part of the speedlimit assist package that was not available on the 2015 model. I have it on my 2016 GLE 400, and miss that feature on my 2015 S550. You would think it would be a software fix as my $120 Garmin GPS has the speed limit feature, and even lets you manually update the speeds if they change. I just had the latest v7 update on my 2015 S550 and it does not have the speed limit function.
Last edited by Radman991; Oct 1, 2016 at 01:24 AM. Reason: Added more info
Super Moderator
Joined: May 2002
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From: Land of 10,000 lakes
AMG GTC Roadster, E63s Ed.1, M8 Comp. Coupe
It is a 2016+ feature but it is a crappy one in the US.
In Europe, the feature is camera-based with database as secondary source. Changes in speed limits due to construction, etc. are picked up immediately and reliably. Same with traffic signs.
Here in the US, it is only database driven which looses a significant real-time aspect.
Our Passport max radar detectors also show the speed limit. Get one of those and you have additional benefits
In Europe, the feature is camera-based with database as secondary source. Changes in speed limits due to construction, etc. are picked up immediately and reliably. Same with traffic signs.
Here in the US, it is only database driven which looses a significant real-time aspect.
Our Passport max radar detectors also show the speed limit. Get one of those and you have additional benefits
Super Moderator
Joined: May 2002
Posts: 10,537
Likes: 3,670
From: Land of 10,000 lakes
AMG GTC Roadster, E63s Ed.1, M8 Comp. Coupe
Could you test this in a construction zone? Pickup should be instant.. thanks!
Senior Member
Joined: Oct 2002
Posts: 369
Likes: 22
From: USA
S550
I'll double check, but I'm pretty it changed in a construction zone. My E has the P3 Package.
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