Drivers flabbergasted by 'mystery' button on rear-view mirror - that only works sometimes - Mirror Online
![Drivers flabbergasted by 'mystery' button on rear-view mirror - that only works sometimes - Mirror Online](https://i2-prod.mirror.co.uk/incoming/article29414795.ece/ALTERNATES/s615b/0_Car-mirror-with-adaptive-dimming-system.jpg)
A number of drivers have been turning to the internet for advice over a little button they spotted on their rear-view mirror - and they were surprised to learn what it really does
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Drivers warned cars have a secret button under rear view mirror which could save lives if used correctly
![](https://www.thesun.co.uk/wp-content/uploads/2023/03/high-quality-image-rear-view-802193738.jpg)
Drivers stunned to learn what the 'secret' button on rear view mirror is really for
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Master Tailgaters OEM Rear View Mirror with 4.3 Auto Adjusting Ultra Bright LCD and OnStar Buttons - Hooks Into Your Existing OnStar Wire
Master Tailgaters Rear View Mirror with OnStar Buttons - Hooks Into Your Existing OnStar Wire, The OEM replacement Ultra Bright 4.3 LCD Rear View
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Master Tailgaters 10.5 OEM Rear View Mirror with 4.3 LCD Screen + OnStar Buttons for Existing Wiring | Rearview Universal Fit | Auto Adjusting
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Drivers warned cars have a secret button under rear view mirror which could save lives if used correctly
![](https://i2-prod.chroniclelive.co.uk/incoming/article27303771.ece/ALTERNATES/s1200c/0_CF_TW150104FLASH-2.jpg)
Drivers are only realising a secret button exists behind your mirror that is 'life-changing' - Chronicle Live