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Adaptive Highbeam Assist Confusion

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Old Mar 31, 2024 | 08:59 PM
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1991 300D, 2006 E320 CDI, 2014 E250 Bluetec
Adaptive Highbeam Assist Confusion

On my E250 Bluetec, adaptive highbeam assist doesn't seem to be working, even though I think I'm meeting all the conditions outlined in the manual. Both green lamps are illuminated in the instrument cluster. But, even when going at speed down the darkest roads, high beams won't come on automatically.

Am I missing something obvious?
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Old Mar 31, 2024 | 09:05 PM
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What do you consider "at speed"? Have you scanned for codes?
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Old Mar 31, 2024 | 09:07 PM
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1991 300D, 2006 E320 CDI, 2014 E250 Bluetec
Well above the 19 mph specified in the manual.

No codes.
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Old Mar 31, 2024 | 09:14 PM
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Originally Posted by shertex
On my E250 Bluetec, adaptive highbeam assist doesn't seem to be working, even though I think I'm meeting all the conditions outlined in the manual. Both green lamps are illuminated in the instrument cluster. But, even when going at speed down the darkest roads, high beams won't come on automatically.

Am I missing something obvious?
And you obviously have automatic high beam enabled in the cluster menu with the auto high beam sign on, right?

What year is your car?
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Old Mar 31, 2024 | 09:20 PM
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1991 300D, 2006 E320 CDI, 2014 E250 Bluetec
The auto high beam sign is on. But I don't see anything in the cluster menu under lights.

It's a 2014.
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Old Apr 1, 2024 | 05:30 AM
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Originally Posted by shertex
Well above the 19 mph specified in the manual.

No codes.
What scan tool did you use?
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Old Apr 1, 2024 | 08:53 PM
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Originally Posted by shertex
The auto high beam sign is on. But I don't see anything in the cluster menu under lights.

It's a 2014.
Sign on means it is enabled.

Your multifunction camera may have gone bad...
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Old Apr 1, 2024 | 08:59 PM
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1991 300D, 2006 E320 CDI, 2014 E250 Bluetec
Alas, it looks like it's not a feature on my particular model.
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Old Apr 1, 2024 | 09:26 PM
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Originally Posted by shertex
Alas, it looks like it's not a feature on my particular model.
Do you have option code 608 for your car?
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Old Apr 1, 2024 | 09:27 PM
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run your VIN through www.lastvin.com to see if you even have the option installed.
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Old Apr 1, 2024 | 09:29 PM
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1991 300D, 2006 E320 CDI, 2014 E250 Bluetec
No...no option 608.
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Old Apr 1, 2024 | 09:31 PM
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Originally Posted by shertex
No...no option 608.
Mystery solved!
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