Any way to disable adaptive cruise?
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Newbie
Joined: Jan 2025
Posts: 7
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450 Cabriolet
Any way to disable adaptive cruise?
I can't find it in the manual or the posts here, although I'm sure it's been asked. Any way to disable distronic and use standard cruise without the adaptive distance? I find sometimes it's not perceptable that I've slowed down 3 or 4 miles below my desired speed setting. Where I would have passed a car in standard cruise control I instead am following a car for a while before I realize I'm not going the speed I want. 2023 E450 Cab. Thanks.
Junior Member
Joined: Dec 2012
Posts: 43
Likes: 9
2005 SL500
An interesting question as Distronic (or Adaptive with other functions added) requires more sensors etc to work.
There is no published way of doing what you ask and I suspect Mercedes logic is based on including the driver in the system in terms of safety analysis.
In standard cruise control the driver has to monitor the distance to the car in front and brake or overtake as appropriate.
In Distronic, the driver has to monitor the car in front to ensure Distronic is sensing the distance correctly. If it is not, you have to brake or overtake as appropriate. While monitoring you are able to overtake if your speed reduces and it is safe to do so.
Switching off the distance sensing function once it's installed is directly affecting safety "you will hit slower traffic if you don't take avoiding action" wheh inactive as opposed to "you will hit slower traffic if distance sensing fails" if active.
Therefore I suspect rigorous German engineering decided that you can't allow the user to deliberately degrade safety.
I think a failure mode when adaptive is unable to work would be useful, along with a big caption on the instruments / HUD. I don't believe that exists either.
Perhaps a generation or two down the line the car will say "your speed is slowing; would you like me to overtake when safe?"
There is no published way of doing what you ask and I suspect Mercedes logic is based on including the driver in the system in terms of safety analysis.
In standard cruise control the driver has to monitor the distance to the car in front and brake or overtake as appropriate.
In Distronic, the driver has to monitor the car in front to ensure Distronic is sensing the distance correctly. If it is not, you have to brake or overtake as appropriate. While monitoring you are able to overtake if your speed reduces and it is safe to do so.
Switching off the distance sensing function once it's installed is directly affecting safety "you will hit slower traffic if you don't take avoiding action" wheh inactive as opposed to "you will hit slower traffic if distance sensing fails" if active.
Therefore I suspect rigorous German engineering decided that you can't allow the user to deliberately degrade safety.
I think a failure mode when adaptive is unable to work would be useful, along with a big caption on the instruments / HUD. I don't believe that exists either.
Perhaps a generation or two down the line the car will say "your speed is slowing; would you like me to overtake when safe?"
Junior Member
Joined: Mar 2008
Posts: 32
Likes: 0
From: Colorado Springs
2023 E450 4-Matic Cab
I understand your desire to have regular cruise control.
I have a 2023 E450 Cab w/o Distronic. I had Distronic in my 2015 SL400 and I also frequently had the experience of following a car for a while before I realized that I'm going slower than intended. When I got the E450, I was a little disappointed at first that it didn't have Distronic. After driving cross country last month, I've decided that regular cruise control forces me to pay more attention to what's going on around me. This is a good thing.
I have a 2023 E450 Cab w/o Distronic. I had Distronic in my 2015 SL400 and I also frequently had the experience of following a car for a while before I realized that I'm going slower than intended. When I got the E450, I was a little disappointed at first that it didn't have Distronic. After driving cross country last month, I've decided that regular cruise control forces me to pay more attention to what's going on around me. This is a good thing.
Last edited by mjkarin; Jun 15, 2025 at 02:37 PM.
Out Of Control!!
Joined: Nov 2018
Posts: 11,398
Likes: 5,323
From: San Francisco Bay Area
2019 C63CS
Yes, sometimes the car ahead of me slows down and as a result slows me down, but I'm not sure how one doesn't notice that. In those cases I indicate to overtake and as described above, it will then automatically change lanes and accelerate back up to the set speed. Maybe I notice it more, because I generally set my speed 10-20mph above the speed limit, so a car that is barely driving the speed limit will cause a noticeable slowdown on my part.
Last edited by superswiss; Jun 15, 2025 at 07:13 PM.
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