Disable auto speed in cruise








It relies on its knowledge of the road, based on the most recent map update.
Which means that it anticipates the next corner and the next speed limit and the next corner speed warning sign, according to the navigation route you have set and your GIS position.
In practice this means driving at the speed limit, slowing a quarter mile before the lower speed limit ahead, slowing to the posted warning speed for the next corner, which is 10 or 20 mi an hour below where people normally drive.
It's infuriating.
Try it, you'll hate it!
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One is route base speed, and the other is speed sign recognition (or similar wording).
I still don't fully understand what route-based speed does, because I still slow in corners, even though I don't have a destination set - thus no "route."
I'd be curious if you have them both turned off (as I do), because I don't think your experience should be happening.




One is route base speed, and the other is speed sign recognition (or similar wording).
I still don't fully understand what route-based speed does, because I still slow in corners, even though I don't have a destination set - thus no "route."
I'd be curious if you have them both turned off (as I do), because I don't think your experience should be happening.
The route-based speed adaptation and speed limit adoption are separate features and options as shown above and can be turn on/off independently. I have the automatic speed limit adoption turned off, but I left the route-based speed adaptation turned on. A nice feature is that you can always manually adopt the current speed limit by pressing RESUME while DISTRONIC is engaged. I use that to set the initial speed for DISTRONIC based on the current speed limit and then manually adjust up for the usual 10-20 mph over. I never actually use the SET function to take the current speed as the DISTRONIC speed.
Last edited by superswiss; Jan 22, 2024 at 07:01 PM.




The route-based speed adaptation and speed limit adoption are separate features and options as shown above and can be turn on/off independently. I have the automatic speed limit adoption turned off, but I left the route-based speed adaptation turned on. A nice feature is that you can always manually adopt the current speed limit by pressing RESUME while DISTRONIC is engaged. I use that to set the initial speed for DISTRONIC based on the current speed limit and then manually adjust up for the usual 10-20 mph over. I never actually use the SET function to take the current speed as the DISTRONIC speed.
My experience is similar in some ways, but definitely not when Route Based Speed is disabled but Distronic enabled.
In my case, the car slows in corners whether I like it or not. If I'm following a line of cars on a curvy Road, the line leaves me behind as we go around corners.
It's more than scrubbing off speed, because I see my regen green line in the instrument cluster indicating Active Regen (retarding, slowing). With the cruise set at 60, it might slow to 56. I become a moving obstacle.
These observations are my for my 21 GLE 53.
Separately, I absolutely detest route-based speed navigation.
Wherever possible I drive two-lane blacktops. Most often, the speed limit is 60, with occasional slow corners marked 35 mph. Normally I would probably slow from @75 and take those corners at 60 or 55 mph. However, the car slows me to 35 mph about 1-2/10th of a mile before the turn. If there's anyone behind me, they charge right up on me because there's no reason to slow that much, so soon.
I hate it.
Also I'll add that the "adopt the current speed limit by pressing RESUME requires a double press on Resume. I'll do that when the radar detector goes off. Maybe.
Last edited by mikapen; Jan 23, 2024 at 11:37 AM.








So to clarify a bit,
The car has way too much power to slow down going around corners with Distronic, so you shouldn't have to override it by adding throttle IMO.
In my case, the car is actively slowing by regenerative braking, in the middle of a corner while the traffic ahead is accelerating. Same if there's no traffic at all.
The Distronic can hold speed on any hill I've used it on, but not corners.
It seems silly to use the throttle to maintain a speed that you have set.
@superswiss do you have any insight about what could be going on? Is it some g sensor that doesn't like lateral g's?
To me it seems like "route-based speed adaptation" is still active in some minor way, even though I have it switched off, with no route.
Any ideas what I might try?




So to clarify a bit,
The car has way too much power to slow down going around corners with Distronic, so you shouldn't have to override it by adding throttle IMO.
In my case, the car is actively slowing by regenerative braking, in the middle of a corner while the traffic ahead is accelerating. Same if there's no traffic at all.
The Distronic can hold speed on any hill I've used it on, but not corners.
It seems silly to use the throttle to maintain a speed that you have set.
@superswiss do you have any insight about what could be going on? Is it some g sensor that doesn't like lateral g's?
To me it seems like "route-based speed adaptation" is still active in some minor way, even though I have it switched off, with no route.
Any ideas what I might try?
So it does sound like route-based speed adaption isn't actually off in your case. The other thing I can think of is that the SUVs have rollover protection, so it might slow down regardless. I know that ESP is never really off in the SUVs, because of the rollover protection for example. I don't have these issues with my C63 coupe. There's not danger of rolling over, so no nannies that are trying to prevent it.
Number 5 below is the symbol I'm talking about that indicates the reduced speed.
Last edited by superswiss; Jan 23, 2024 at 03:09 PM.




I doubt that it's rollover protection though, because it happens when traffic is flowing at 55 in a 65 speed limit. (In that case, I'll set the cruise at 75 with an appropriate following distance.)
Probably less than 0.1g, but you never know about Nannies.





