GLS Class (X166) Produced from 2016 to 2019

Rear view Mirror/SOS switch/rain sensor location

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Old May 9, 2026 | 10:54 PM
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Rear view Mirror/SOS switch/rain sensor location

Anyone know how/where the rearview mirror/SOS button/lane keep camera/rain sensor section is fused? They are no longer working (buttons don't light up, I get the SOS not operative, automatic headlights disabled message) and I am thinking it may be a fuse issue-I've checked all the ones I can find and checked the fuse diagram but haven't found any popped, so short of that unsure what may be causing it but it's clearly power related. Car is a 2018 GLS63. Thanks!
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Old May 10, 2026 | 05:44 AM
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chat gpt gives surprisingly good answers try it
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Old May 12, 2026 | 10:11 AM
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OK F111 should be in the Passenger footwell box, that is the OCP fuse. F125 in the same box should be Telematics (SOS) and F130 Interior Lighting/Sensors

If F111 is indeed blown and blows again in fairly short order, it is likely your Rain/Light Sensor has an internal short. Diagnostics, if it fails again, unplug the rain sensor and replace the fuse again. If everything else is fine (SOS/overhead lights) then you know you have a short in the Rain Sensor.

Last edited by thtguy; May 12, 2026 at 10:29 AM.
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Old Yesterday | 09:06 PM
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Originally Posted by thtguy
OK F111 should be in the Passenger footwell box, that is the OCP fuse. F125 in the same box should be Telematics (SOS) and F130 Interior Lighting/Sensors

If F111 is indeed blown and blows again in fairly short order, it is likely your Rain/Light Sensor has an internal short. Diagnostics, if it fails again, unplug the rain sensor and replace the fuse again. If everything else is fine (SOS/overhead lights) then you know you have a short in the Rain Sensor.
huge help; when you say passenger footwell, are you referring to the passenger side (US car) on the side of the dashboard? Or is there one not labeled in the fuse diagram in the footwell as well?
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