Reading Speed limit signs.
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2005 S55, 2018 S63
Reading Speed limit signs.
I have a 2018 S63 and have found that the navigation system doesn't always pick up the speed sign reading.
Also - I've experienced that in residential area's that the speed limit goes from 25 MPH to 65 MPH despite there being no signs posted.
Is there are channel to feed this kind of information back to Mercedes so they can improve the functionality ?
Also - I've experienced that in residential area's that the speed limit goes from 25 MPH to 65 MPH despite there being no signs posted.
Is there are channel to feed this kind of information back to Mercedes so they can improve the functionality ?
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From: Sarasota, Florida
2023 E450 Cabriolet, 2019 F150 Platinum, 2014 Dodge Challenger R/T
I doubt it.... the mph is embedded into the gps maps.... which MB doesn't create... I use those with grain of salt... road construction will change the speed etc... so I can't see how it could be 100% accurate...
Mike
Mike
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2005 S55, 2018 S63
I'm actually pretty confident that it's a camera that reads the speed sign.
For a couple of reasons:
1) Speed limit change exactly when car is kind of perpendicular to the sign.
2) In rare cases I've seen the sign being obstructed by a truck in which case the speed limit doesn't change
3) The car does pickup speed signs that are set up for road construction.
4) One of the sign's that my car fails to pick up has a failure rate of 95% but still manage to read the right limit 5% of the time.
For a couple of reasons:
1) Speed limit change exactly when car is kind of perpendicular to the sign.
2) In rare cases I've seen the sign being obstructed by a truck in which case the speed limit doesn't change
3) The car does pickup speed signs that are set up for road construction.
4) One of the sign's that my car fails to pick up has a failure rate of 95% but still manage to read the right limit 5% of the time.
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AMG GTC Roadster, E63s Ed.1, M8 Comp. Coupe
I'm actually pretty confident that it's a camera that reads the speed sign.
For a couple of reasons:
1) Speed limit change exactly when car is kind of perpendicular to the sign.
2) In rare cases I've seen the sign being obstructed by a truck in which case the speed limit doesn't change
3) The car does pickup speed signs that are set up for road construction.
4) One of the sign's that my car fails to pick up has a failure rate of 95% but still manage to read the right limit 5% of the time.
For a couple of reasons:
1) Speed limit change exactly when car is kind of perpendicular to the sign.
2) In rare cases I've seen the sign being obstructed by a truck in which case the speed limit doesn't change
3) The car does pickup speed signs that are set up for road construction.
4) One of the sign's that my car fails to pick up has a failure rate of 95% but still manage to read the right limit 5% of the time.
Our cars accuracy of reading the signs is about 90%. In Europe I have seen another logic that if no sign was seen for the last few minutes, it re-establishes the previous default speed limit. For example a lower speed limit sign for construction was detected but not the cancellation of the lower speed limit at the end of the construction zone, if will automatically go back to the prior speed. It does it since there is a requirement in Europe to show a reduced speed limit in certain repeat intervals. The system also recognizes conditional speed limits (x-speed when wet or with fog). Never seen that in the US.
Personally I find it helpful but a nuisance when using Distronic where the cars is automatically throttled when a lower speed limit it detected. This setting can be disabled of course...
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From: Birmingham, AL
2019 S560, 2022 Audi S8
My 2017 MB changed based on satellite info. The new 2019 reads the signs. I know this because a truck obstructed direct view of the sign and the car did not react. I had to intervene and lower my speed manually. I hate that they did not integrate both GPS info with live interaction of cameras.
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2019 S560, 2015 Honda Civic Hybrid
Interesting discussion ... there's a park road near my home with overhead signs saying "25 MPH limit when flashing". They turn on the flashing lights on summer weekend afternoons when the park's crowded.
My 2016 displays "20 mph School Zone" when I drive past these signs. Makes me think it was captured in some database used by the nav system and not read by the car in real time.
My 2016 displays "20 mph School Zone" when I drive past these signs. Makes me think it was captured in some database used by the nav system and not read by the car in real time.
