High Beam Assist ???
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Joined: Dec 2009
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From: Pittsburgh
2010 EClass 350 Sport 4Matic
High Beam Assist ???
Does anyone with high-beam assist have an issue with the high-beams not coming back on once they turn off?
Driving with the high-beam on, oncoming traffic leads to the high-beams turning off, after things have cleared and there is no other oncoming light or street lights, the high-beams won't come back. I notice that the light beam is on the low setting and the blue indicator light on the dash, does not come back on. I have to toggle the switch a couple of times to get the high-beams back on. If I deactivate the assist, the high-beams come on manually as you would expect.
Driving with the high-beam on, oncoming traffic leads to the high-beams turning off, after things have cleared and there is no other oncoming light or street lights, the high-beams won't come back. I notice that the light beam is on the low setting and the blue indicator light on the dash, does not come back on. I have to toggle the switch a couple of times to get the high-beams back on. If I deactivate the assist, the high-beams come on manually as you would expect.
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Sounds odd if you mean the car does not see any lights from facing traffic or other lights that could affect the system. And you are driving above the speed threshold where high beams come on?
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From: Pittsburgh
2010 EClass 350 Sport 4Matic
The car does turn the high-beam off when another car comes at us. It must do that efficiently as I have never been flashed by the other driver that my "brights" are on. The issue is that the brights do not return once the road ahead is clear of oncoming traffic. As far as speed goes, I don't think I'm driving to slow or fast...on the one road in question we are driving 30-40PH. Maybe we are not at the 34MPH threshold long enough to engage the brights? There are no street lights on this road either, just houses. But there are long stretches of just darkness too.
Last edited by Steeler Nation; Jan 17, 2010 at 08:47 AM. Reason: Added more info.
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One thing to keep in mind there is a minimum speed threshold which you must be above in order for the adaptive high beams to operate. I think this is in the 35 mph range. This could explain it. Otherwise, something is not quite right. Try it on a road with a higher speed limit and then you'll know for sure. Good luck.
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The car does turn the high-beam off when another car comes at us. It must do that efficiently as I have never been flashed by the other driver that my "brights" are on. The issue is that the brights do not return once the road ahead is clear of oncoming traffic. As far as speed goes, I don't think I'm driving to slow or fast...on the one road in question we are driving 30-40PH. Maybe we are not at the 34MPH threshold long enough to engage the brights? There are no street lights on this road either, just houses. But there are long stretches of just darkness too.
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From: Jersey Shore
2010 E350 Sport 4 Matic, 2008 Lexus GX470, 03 SVT Cobra, 08 F250 Twin Turbo Diesel, 07' Lexus ES350
Mine works like a charm. Only thing I've realized is that the high beams won't come back on if there is ample ambient lighting on the roadway. If there are plenty of lights on the side of the roads, it picks them up as on-coming traffic.
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E550 Coupe
Mine work very well, too. It's like watching the headlights do a little dance at night. I live in NC and the roads here are dark--even within city limits. I'm always amazed when the system "sees" tail lights in front of me and brings the lights down to somewhere between high and low until they can safetly go back to highbeam.
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From: Pittsburgh
2010 EClass 350 Sport 4Matic
After further experimenting, it does seem to be speed related. It appears that the car has to be going consistently over 35MPH for the high-beams to fully engage. The sensor is VERY sensitive to light. I guess for safety reasons this has to be the case.
To be honest I never found toggling the switch between low and high to that big of a pain that I wished the car would do it for me.
To be honest I never found toggling the switch between low and high to that big of a pain that I wished the car would do it for me.
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