SL-Class (R231) 2013 on: Discussion on the SL550

SL/R231: Magic Sky Roof R231

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Old 04-18-2024, 05:16 PM
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2013 SL 550 R231
Magic Sky Roof R231

2013 SL 550 R231
Hello everyone,
I have just noticed today that my rarely used Magic Sky roof is no longer opaque when on.
I do not remember if it’s supposed to block all light or some light.
Can this roof get weaker, is there an ajustement to control the intensity.
Today when I turned it on I did notice a difference in the light coming through but unless I am mistaken it used to block 100% of the light.
Any input would be appreciated.
Thanks
SLDoug
Old 04-18-2024, 05:34 PM
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2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
It darkens, but doesn't block 100% of light. At least mine never has.
Old 04-18-2024, 06:05 PM
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2013 SL 550 R231
Magic Sky

Thank you for your input.
if my memory is correct, when it was on, I could not make out building or trees or the outside world but now I do.
Am I wrong, yes it reduces sunlight but it used to block out more,
thanks
Old 04-18-2024, 07:26 PM
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Not sure if the setting is adjustable. I might have to ask @BenzNinja .
Old 04-18-2024, 08:13 PM
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BenzNinja says that the module that is controlling the amount of voltage is probably failing and needs to be replaced and coded to restore what you had.

I will check mine tomorrow and try to post some pics.
Old 04-19-2024, 06:45 AM
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Thank you, looking forward for it
Old 04-19-2024, 07:03 AM
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When in block mode I cannot see anything on the outside via my magic sky. When in unblocked mode I see out like a clear and normal window. There is no adjusting the intensity of magic sky. Check the condition of the 12v battery in the car, because when that is going bad many things can go wrong....

Originally Posted by SLDOUG
Thank you for your input.
if my memory is correct, when it was on, I could not make out building or trees or the outside world but now I do.
Am I wrong, yes it reduces sunlight but it used to block out more,
thanks

Last edited by ThatsMyDawg; 04-19-2024 at 09:30 AM.
Old 04-19-2024, 07:13 AM
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Thanks but it must be something else because both batteries are new
Old 04-19-2024, 08:51 AM
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2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Ok, here are some pics I took this morning.

1. The first is before I started the car. (Very dark)
2. Magic Sky off (1st push). Car on, engine running. (Clear)
3. Magic Sky on (2nd push). Car on, engine running. (Darker than Clear)
4. Car off. (Dark, but not Very Dark)

Transition to Dark is not instantaneous. I suspect that over time, it will continue to darken. I assume that voltage on makes it clear and voltage off allows it to darken.



#1

#2

#3

#4

Last edited by JettaRed; 04-19-2024 at 08:55 AM.
Old 04-19-2024, 09:14 AM
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I also noticed that the roof did not immediately lighten when I turned the car on, but only after I pushed the button. It does go clear immediately, but darkening takes several seconds.
Old 04-19-2024, 09:40 AM
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Thanks a lot for taking the time to share your pictures with me, it’s appreciated however it does not tell me why it’s no longer opaque and how to fix it
Best regards to you
SLDoug
Old 04-19-2024, 09:48 AM
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Originally Posted by SLDOUG
Thanks a lot for taking the time to share your pictures with me, it’s appreciated however it does not tell me why it’s no longer opaque and how to fix it
Best regards to you
SLDoug
Right. I was showing for comparison purposes. Mine has never been 100% dark. And as I mentioned, @BenzNinja says it's the control module that is going bad on yours and needs replacement.
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Old 04-19-2024, 09:49 AM
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Thanks will look into it
Old 04-19-2024, 10:06 AM
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Did you read this?

Not exactly the same thing. But...a hard reset may work.

https://mbworld.org/forums/sl-class-...sn-t-work.html
Old 04-19-2024, 12:43 PM
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It appears fuse #71 is used by the Magic Sky Control. Fuse #71 is in the fuse block behind the passenger seat. It's 7.5A, one of the unusual sizes.



Old 04-19-2024, 06:33 PM
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Thinking about this more, it appears that the roof darkens without power. It may be that you do not actually go to 0 V when pressing the button to turn off the tinting. Pulling fuse #71 would be a way to test if the control module is going bad or if the roof glass is going bad. I would pull the fuse and see how dark the roof becomes.
Old 04-19-2024, 06:59 PM
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From today.

Car on, cloaking activated lol
next pic is car on cloaking deactivated.





Originally Posted by JettaRed
I also noticed that the roof did not immediately lighten when I turned the car on, but only after I pushed the button. It does go clear immediately, but darkening takes several seconds.
Old 04-19-2024, 08:06 PM
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Just ran a test of the Magic Sky Control module to measure voltages and whether there was adjustment to the tinting. The roof is darkest when Magic Sky Control is OFF (Deactivated) and the voltage is 0 V. The roof is clear when ON (Activated) and voltage is ~120 V. Also, with the proper scan tool, any fault codes (there are 19 or 20) will be detected.

@SLDOUG if you really think it is not as dark as before, check first thing in the morning as it does take several hours for the glass to completely darken. Get a LAUNCH Creader Elite 2.0 BENZ and scan for any codes.

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