E-Class (W212) 2010 - 2016: E 350, E 550
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outside driver's mirror sometimes dark

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Old Feb 9, 2016 | 04:55 PM
  #1  
rovermark's Avatar
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2011 E350 4Matic Estate in Mystic Red
outside driver's mirror sometimes dark

sometimes only - very dark, almost black. can be day or night. otherwise, when not dark, looks fine.

known fault? cause? should the mirror be changed?

thanks
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Old Feb 9, 2016 | 05:09 PM
  #2  
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W204 C63 AMG, W212 E250 CGI, C207 E250 CGI
yes the mirror can be changed but im not sure what the problem is.

is your car tinted?
are you saying the mirror has no reflection and turns completely black even on daytime?
are you sure youre not just seeing the reflection of your car interior from the window?
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Old Feb 9, 2016 | 05:09 PM
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2010 E550 P2 w/AMG Sport Package + Pano, 2015 Nissan Pathfinder
That is very odd. I've never heard of anything like that on any car.
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Old Feb 9, 2016 | 05:14 PM
  #4  
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2011 E350 4Matic Estate in Mystic Red
Originally Posted by beejAMG
yes the mirror can be changed but im not sure what the problem is.

is your car tinted?
are you saying the mirror has no reflection and turns completely black even on daytime?
are you sure youre not just seeing the reflection of your car interior from the window?

The outside mirror dims at night along with the inside rear view mirror. it seems however to sometimes dim to the point of being almost black at random times. I cannot see out of it when it does this because it is too dark. it still reflects; again, not all the time. Sometimes it is fine.

This is the same as your interior rear-view mirror - it dims at night.

The car is unmodified. First started to do this about 3 -4 months ago.
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Old Feb 9, 2016 | 06:21 PM
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2014 E350 also restored: 1969 Camaro convertible SS 1957 Chevy Belair 2dr hardtop
If it is under warranty then make the dealer replace it. If not wait until you find a good deal on a replacement
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Old Feb 9, 2016 | 06:38 PM
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Have someone pull fault codes using MB DAS, but good chance it is the exterior mirror glass since dimming is synchronized with interior mirror that is not affected. Is vehicle equipped with right side dimmable mirror and if so, does it working properly. Post or PM VIN if you need mirror glass part #.
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Old Feb 9, 2016 | 06:52 PM
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2011 E550
I've noticed the same thing on my car, it only happens to the driver mirror.

It doesn't bother me much so I haven't mentioned it to the dealer but I will the next time I have the car serviced...
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Old Feb 9, 2016 | 08:30 PM
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If your cars are still under warranty, I'd get this resolved before the warranty expires. Certain driver's side mirror glass part numbers are frightfully expensive to buy (the ones with radar sensors are over $1,000 USD).
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Old Feb 9, 2016 | 09:07 PM
  #9  
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Don't know if this is your problem but, on my car, I attached a child observation mirror under the rear view mirror in such a way as to cover the photo sensitive "eye" on the back of the right hand side of the rear view mirror that controls the automatic high beam dimmer ('darkening') system for the rear view and driver's side mirror. Everything worked fine for a while, but one day both the rear view and driver's side mirror went dark during the day as well as night and stayed that way . Dealer fixed it by removing the kid's mirror and resetting the auto dimmer system -- no charge.
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Old Feb 9, 2016 | 09:11 PM
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2011 E550
Originally Posted by SteveE400
If your cars are still under warranty, I'd get this resolved before the warranty expires. Certain driver's side mirror glass part numbers are frightfully expensive to buy (the ones with radar sensors are over $1,000 USD).
Yeah I have two and a half years left on my warranty... that's half the reason I frequent this forum so often is to find out stuff like this and have it fixed before warranty expires.

I figure between putting 50k/year on the engine and reading here i'll have a brand new car by the time I hit 225k in the next two and a half years
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Old Feb 10, 2016 | 12:05 AM
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Originally Posted by cc16177
I've noticed the same thing on my car, it only happens to the driver mirror.

It doesn't bother me much so I haven't mentioned it to the dealer but I will the next time I have the car serviced...

Only the driver side mirror has the "darkening" function. this is because it it a straight glass. Passenger side is a convex mirror that send only a part of the reflected light to you eye.
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Old Feb 10, 2016 | 03:54 AM
  #12  
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c 238 220 diesel 4matic
pleas doe not read innstruction manual ..;(
Automatisch abblendende Spiegel

Warnung

Der Innen- und Außenspiegel auf der Fahrerseite blenden automatisch ab, wenn gleichzeitig
die Zündung eingeschaltet ist und
einfallendes Scheinwerferlicht auf den Sensor im Innenspiegel trifft.
Wenn der Rückwärtsgang eingelegt ist oder die Innenbeleuchtung eingeschaltet ist, blenden die Spiegel nicht ab.
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Old Feb 10, 2016 | 10:58 AM
  #13  
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E 350
Originally Posted by cc16177
Yeah I have two and a half years left on my warranty... that's half the reason I frequent this forum so often is to find out stuff like this and have it fixed before warranty expires.

I figure between putting 50k/year on the engine and reading here i'll have a brand new car by the time I hit 225k in the next two and a half years
Is the warranty for unlimited miles? As far as I know they expire when you reach 60,000 miles (unless extended to 100,000 miles).
If not you should fix it ASAP.
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Old Feb 10, 2016 | 11:16 AM
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I've noticed the driver side mirror darkening too much before with the auto dim feature. It is rare and normally due to headlights behind me (working as it should I guess so I don't get blinded by some truck). But it does make it harder to see the next lane. So I just turn my head when changing lanes.
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Old Feb 10, 2016 | 02:04 PM
  #15  
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Originally Posted by pamiboy
Is the warranty for unlimited miles? As far as I know they expire when you reach 60,000 miles (unless extended to 100,000 miles).
If not you should fix it ASAP.
Yes, unlimited miles.

It's the primary reason I purchased Mercedes over a BMW/Audi.

I was never a big Mercedes fan but due to the warranty I bought one and I've fallen in love!
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Old Jul 3, 2016 | 09:39 AM
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was this resolved for those who had the issue? how? I've got the same problem, had my E400 for three weeks and it just started.
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Old Jul 3, 2016 | 10:02 AM
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Can you turn the auto dim feature off or is it another hard wired feature?
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