GLC Class (X253) Produced 2016-2022

Blinking light on reverse

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Old Sep 6, 2021 | 02:57 PM
  #1  
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X253 GLC 220d, Mazda MX-5 ND RF
Blinking light on reverse

Hi there.
I always forget to get some help to check it so I'm stuck with the question :-)
Whenever I'm switching to reverse to back up into the garage I see on the 360 camera view that there is some blinking white light on the right side of the car (I also see the reflections on the wall). Unfortunately, when I activate parking brake and open the door, the car switches to neutral and stops blinking.
It's driving me nuts. What is this light and where is it located?
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Old Sep 6, 2021 | 04:17 PM
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Hmmm, quick question, are you sure you aren't looking at the reverse light? I believe the car's backup camera captures an LED light different compared to our eyes. If you for example point your camera to the DRL at certain frames per second, it will be seen as it is flickering because LED lights aren't actually on all the time when in operation, it turns on and off rapidly.

Last edited by W205C43PFL; Sep 6, 2021 at 04:26 PM.
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Old Sep 6, 2021 | 04:21 PM
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I think you are talking about this light:
https://www.la.mercedes-benz.com/en/...406205440.jpeg
It isn't supposed to blink but the refresh rate of the camera capturing the light makes it blinks, please see the post above.

Last edited by W205C43PFL; Sep 6, 2021 at 04:27 PM.
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Old Sep 6, 2021 | 04:50 PM
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No, it's a light on the right side of the car. From the inside (and from the 360 look) seems as if it should be positioned somewhere near right mirror. And it's not flickering. It's blinking like a sonar beep.
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Old Sep 6, 2021 | 04:54 PM
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Originally Posted by lastrycjusz
No, it's a light on the right side of the car. From the inside (and from the 360 look) seems as if it should be positioned somewhere near right mirror. And it's not flickering. It's blinking like a sonar beep.
I see, sounds like the puddle light (in the right side mirror) or the exterior door handle light. However it shouldn't be blinking though.
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Old Sep 7, 2021 | 02:14 AM
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Originally Posted by W205C43PFL
I see, sounds like the puddle light (in the right side mirror) or the exterior door handle light. However it shouldn't be blinking though.
I did a video this morning with my cellphone finally :-)
It seems that it's indeed the light bulb situated on the bottom of the right side mirror. But what's the point of that??? To scare off the frogs?
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Old Sep 7, 2021 | 07:54 AM
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Originally Posted by lastrycjusz
I did a video this morning with my cellphone finally :-)
It seems that it's indeed the light bulb situated on the bottom of the right side mirror. But what's the point of that??? To scare off the frogs?
It has multiple purposes : ) For example to see puddles after a rainstorm so you don't step on it when entering the vehicle.
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Old Sep 7, 2021 | 07:56 AM
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but... hmmm.. we haven't figure out the mystery of why it blinks though, could it be because of the differences of FPS of the camera I mentioned earlier? The puddle lights (plural) should be on both side mirrors, so I wonder why you don't notice a white light on the left side as well.
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Old Sep 7, 2021 | 09:47 AM
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Originally Posted by W205C43PFL
It has multiple purposes : ) For example to see puddles after a rainstorm so you don't step on it when entering the vehicle.
Sure. I understand what is the normal point of puddle lamp. I'm just wondering what's the purpose of the light blinking this way.
And no, as I wrote before - it's not filckering. The frequency is around 1Hz, maybe less.
It looks like this:

And it seems it's only on the right side (the picture is mirrored because it's from the front phone cam).
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Old Sep 7, 2021 | 09:59 AM
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Originally Posted by lastrycjusz
Sure. I understand what is the normal point of puddle lamp. I'm just wondering what's the purpose of the light blinking this way.
And no, as I wrote before - it's not filckering. The frequency is around 1Hz, maybe less.
It looks like this:
https://www.youtube.com/watch?v=H1VstBXDetA

And it seems it's only on the right side (the picture is mirrored because it's from the front phone cam).
I see. My bad forgot you mentioned that. My car (C-Class sedan not GLC though) doesn't do that so I am not quite sure why yours is doing that unless it is a feature if so I don't quite understand the purpose of that either. Do you want to take it to your dealership to have them look at?
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Old Sep 7, 2021 | 10:04 AM
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Originally Posted by W205C43PFL
I see. My bad forgot you mentioned that. My car (C-Class sedan not GLC though) doesn't do that so I am not quite sure why yours is doing that unless it is a feature if so I don't quite understand the purpose of that either. Do you want to take it to your dealership to have them look at?
Naaah. It doesn't look as if there was something broken or something. It's just that I don't see any point in this light :-)
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Old Sep 7, 2021 | 10:54 AM
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Originally Posted by lastrycjusz
Naaah. It doesn't look as if there was something broken or something. It's just that I don't see any point in this light :-)
and... you would of thought if it constantly illuminate will be more helpful at night than just blink right?
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Old Sep 8, 2021 | 03:15 AM
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Originally Posted by W205C43PFL
and... you would of thought if it constantly illuminate will be more helpful at night than just blink right?
That too. But come to thing of it, even with constant light, the puddle light in the mirror has limited sense. True, it can illuminate surroundings if you're approaching the car from outside but if you want to get out of the car and open the door, the light is shadowed by the door so you step out into the dark anyway.
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Old Sep 8, 2021 | 07:13 AM
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Originally Posted by lastrycjusz
That too. But come to thing of it, even with constant light, the puddle light in the mirror has limited sense. True, it can illuminate surroundings if you're approaching the car from outside but if you want to get out of the car and open the door, the light is shadowed by the door so you step out into the dark anyway.
I see. I personally found it pretty bright and useful though plus with the help of the exterior door handle lights illuminating I can see the ground pretty well even when it rains. As for when getting out of the car, there is another light under the door that illuminates that other cars also have when you open the door, although it isn't as bright but you can always swap that one to a brighter one.
That being said, the GLC is much higher than the C-Class sedan so that might be the reason why the light is way scattered on your car, that explains why our experience with it is completely different. : )
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Old Sep 18, 2021 | 06:51 AM
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OK. So now I'm lost completely.
I don't know exactly when but it turns out the light stopped turning on. It no longer blinks on its own. I pull into the garage - nothing. I drive out of the garage - nothing. As you could see on the recording, it was enough that I entered the car and started the engine - the light would start blinking. Now - nothing.
I'll have to ask at the shop - I have to schedule a maintenance in a month or so anyway. But, honestly, I doubt they'll be of much use here.
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Old Sep 18, 2021 | 07:00 AM
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Originally Posted by lastrycjusz
OK. So now I'm lost completely.
I don't know exactly when but it turns out the light stopped turning on. It no longer blinks on its own. I pull into the garage - nothing. I drive out of the garage - nothing. As you could see on the recording, it was enough that I entered the car and started the engine - the light would start blinking. Now - nothing.
I'll have to ask at the shop - I have to schedule a maintenance in a month or so anyway. But, honestly, I doubt they'll be of much use here.
Hmmm I see. I was wondering if it was supposed to blink in the first place earlier in my post (my car doesn't do that that is why I suggested you to go to the dealership as I suspected the light may be failing but I didn't tell you what I thought because you don't have use for it) Honestly, since you don't have use for it, I guess don't bother getting it checked and waste your time at the dealership when you could use it for something else? Nowadays, I just don't go to the dealership anymore because it is a waste of time for me, not sure about you though, up to you obviously : )

Edit: Neverminded forgot you mentioned you are scheduled for a routine maintenance so ya I guess get it replaced on your next service visit, while you are at it, check your left mirror puddle light as well and also tell them to check the light bulbs under the door handles.

Last edited by W205C43PFL; Sep 18, 2021 at 07:03 AM. Reason: Added info
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