Strange routing
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MBWorld Fanatic!
Joined: May 2018
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From: Illinois
2021 c300 Cab. Arrived 7/28/21 . 24 GLE 450e.
Strange routing
Before anyone says anything, I know I can use CarPlay. I figure since I paid for it, I’m going to use navigation. I have a 2024 GLE 450e. I live in the Tampa area. I’m taking a route from Brandon Florida to my place. It’s a straight 20 miles on interstate 75. Twice it has routed me off of 75. Even though the map itself clearly shows 75 has no traffic and 15 minutes shorter. If I cancel nav and redo it, it will correct itself. This is strange and protentally very time consuming if I didn’t know the area and my wife didn’t have a map up on her phone and telling me 75 is clear. When I’m traveling 75 mph, I can’t always look at the screen and see that its route makes no sense. Has anyone else run into this?
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Joined: Nov 2018
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From: San Francisco Bay Area
2019 C63CS
Not knowing the particular situation, it's gonna be hard to say. One thing to check though is your route settings. Make sure you have the route type set to fastest and not shortest and all the other settings are correct. Having said that, I've had these kinds of experiences even with Google Maps, where for some reason it made me exit the highway just to rejoin it again at the next onramp. It's generally data issues with the map. Some aspect of the road that isn't correctly recorded in the map data or possibly a fluke in the live traffic feed. GPS is just a guidance. Ultimately, it's up to you to decide. Just following GPS has gotten people drive into lakes and such and that's with Google Maps BTW. Most recently Google Maps has gotten several people stuck in Death Valley. No navigation system is a 100% free of flaws.
Thread Starter
MBWorld Fanatic!
Joined: May 2018
Posts: 1,432
Likes: 300
From: Illinois
2021 c300 Cab. Arrived 7/28/21 . 24 GLE 450e.
Not knowing the particular situation, it's gonna be hard to say. One thing to check though is your route settings. Make sure you have the route type set to fastest and not shortest and all the other settings are correct. Having said that, I've had these kinds of experiences even with Google Maps, where for some reason it made me exit the highway just to rejoin it again at the next onramp. It's generally data issues with the map. Some aspect of the road that isn't correctly recorded in the map data or possibly a fluke in the live traffic feed. GPS is just a guidance. Ultimately, it's up to you to decide. Just following GPS has gotten people drive into lakes and such and that's with Google Maps BTW. Most recently Google Maps has gotten several people stuck in Death Valley. No navigation system is a 100% free of flaws.
The route it wants me to take is both out of the way and a surface street with traffic lights.
Last edited by Elvisfan0108; Jan 25, 2025 at 04:53 PM.
Out Of Control!!
Joined: Nov 2018
Posts: 11,471
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From: San Francisco Bay Area
2019 C63CS
Can you clarify how it shows the highway route as 15 minutes shorter when it reroutes you? Is that after you cancel and restart? Because once it decides to reroute you it shows the new route, right?
The thing is with the nature of the routing being dynamic based on traffic if it receives bad data that gets factored into the current route, this bad data is discarded if you cancel and start a new route guidance. The new route will also have a completely new starting point so any prior decision it made is no longer part of the picture.
Does it happen consistently in the same spot or only intermittently? If the latter, then it's likely an intermittent bad local data feed.
BTW, other MBs on the road now also send traffic related information to other MBs via the car to x conmunication. Newer models even detect potholes through the suspension and send that information to other MBs. So there is potential of bad data being shared between vehicles that can intermittently lead to odd routing decisions.
The thing is with the nature of the routing being dynamic based on traffic if it receives bad data that gets factored into the current route, this bad data is discarded if you cancel and start a new route guidance. The new route will also have a completely new starting point so any prior decision it made is no longer part of the picture.
Does it happen consistently in the same spot or only intermittently? If the latter, then it's likely an intermittent bad local data feed.
BTW, other MBs on the road now also send traffic related information to other MBs via the car to x conmunication. Newer models even detect potholes through the suspension and send that information to other MBs. So there is potential of bad data being shared between vehicles that can intermittently lead to odd routing decisions.
Last edited by superswiss; Jan 25, 2025 at 06:06 PM.
Out Of Control!!
Joined: Nov 2018
Posts: 11,471
Likes: 5,357
From: San Francisco Bay Area
2019 C63CS
The other thing I'm not quite clear on is the sequence of things. Is what you are experiencing the result of a dynamic reroute, or was the route plotted like this from the beginning? Full disclosure, I haven't used MBUX for navigation. The loaners I've driven with MBUX over the last few years never have Mercedes me activated, so I use CarPlay and my 2019 has the slightly older NTG 5.5 COMAND system and when it finds an alternate route it doesn't immediately just reroute me. Instead I'm getting a pop up telling me that it found another route that is x minutes faster. Then I can either accept it or decline it and stay on the current route. Is that also what happens in your case or does it just change the route on you mid flight w/o you accepting the new route?
Last edited by superswiss; Jan 25, 2025 at 06:22 PM.
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GLE450e
Most memorable glitch in my 2024 GLE 450e (11 months, 22,000 miles) was on an all-day route and we had about four hours left. At some point, I glance at the forecast and it is now five hours. I start to second guess myself and try to figure it out while driving, can’t, decide to pull over. Inspection of the map shows the upcoming proposed route is “+55m” relative to the initial path on a freeway. I select the faster path and the forecast adjusts to the expected 4 hour duration, which I complete with no issues.
But…. the thing that bugs me the most is when the initial screen shows me a view just a bit wider than one might consider to be useful. Like, when it includes the moon.
But…. the thing that bugs me the most is when the initial screen shows me a view just a bit wider than one might consider to be useful. Like, when it includes the moon.
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MBWorld Fanatic!
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From: Colorado
'21 AMG53 wDPP & ARC, 19 GLC300 - Former-03 C240,2 ML BlueTecs,20 GLE450 E-ABC,15 Cayenne D,17 Macan
There are other settings in the NAV, that can be enabled/disabled, like Automatic reroute, Notify and ask about reroutes, No ferries, No unpaved roads, pulling a trailer, Quickest Shortest, Display Alternative Routes, that can affect these things. (Don't quote my terms - they're from memory that I used 3 years ago.)
Also, my routing got confused when the State designated Express Lanes and added an underpass. Map updates seemed to have cured this.
Also, my routing got confused when the State designated Express Lanes and added an underpass. Map updates seemed to have cured this.
Last edited by mikapen; Jan 26, 2025 at 02:23 PM.
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SL63
Construction, TFR’s and weather can also play a role. By TFR I mean VVIPs in the area. Also, by construction I mean not only ongoing projects, but overnight small projects that may have already wrapped up, but haven’t updated in any particular individual nav database.
Thread Starter
MBWorld Fanatic!
Joined: May 2018
Posts: 1,432
Likes: 300
From: Illinois
2021 c300 Cab. Arrived 7/28/21 . 24 GLE 450e.
Can you clarify how it shows the highway route as 15 minutes shorter when it reroutes you? Is that after you cancel and restart? Because once it decides to reroute you it shows the new route, right?
The thing is with the nature of the routing being dynamic based on traffic if it receives bad data that gets factored into the current route, this bad data is discarded if you cancel and start a new route guidance. The new route will also have a completely new starting point so any prior decision it made is no longer part of the picture.
Does it happen consistently in the same spot or only intermittently? If the latter, then it's likely an intermittent bad local data feed.
BTW, other MBs on the road now also send traffic related information to other MBs via the car to x conmunication. Newer models even detect potholes through the suspension and send that information to other MBs. So there is potential of bad data being shared between vehicles that can intermittently lead to odd routing decisions.
The thing is with the nature of the routing being dynamic based on traffic if it receives bad data that gets factored into the current route, this bad data is discarded if you cancel and start a new route guidance. The new route will also have a completely new starting point so any prior decision it made is no longer part of the picture.
Does it happen consistently in the same spot or only intermittently? If the latter, then it's likely an intermittent bad local data feed.
BTW, other MBs on the road now also send traffic related information to other MBs via the car to x conmunication. Newer models even detect potholes through the suspension and send that information to other MBs. So there is potential of bad data being shared between vehicles that can intermittently lead to odd routing decisions.
Thread Starter
MBWorld Fanatic!
Joined: May 2018
Posts: 1,432
Likes: 300
From: Illinois
2021 c300 Cab. Arrived 7/28/21 . 24 GLE 450e.
The other thing I'm not quite clear on is the sequence of things. Is what you are experiencing the result of a dynamic reroute, or was the route plotted like this from the beginning? Full disclosure, I haven't used MBUX for navigation. The loaners I've driven with MBUX over the last few years never have Mercedes me activated, so I use CarPlay and my 2019 has the slightly older NTG 5.5 COMAND system and when it finds an alternate route it doesn't immediately just reroute me. Instead I'm getting a pop up telling me that it found another route that is x minutes faster. Then I can either accept it or decline it and stay on the current route. Is that also what happens in your case or does it just change the route on you mid flight w/o you accepting the new route?
Out Of Control!!
Joined: Nov 2018
Posts: 11,471
Likes: 5,357
From: San Francisco Bay Area
2019 C63CS
Good call. That'll tell you if it thinks the new route is actually faster or if as you say there's a bug and it incorrectly reroutes onto a slower route.
