They are your home link buttons that can be used for such things as opening your garage door, but they might be able to be programed for other uses. There is info in your owners manual to guide you through it, although some garage door opening remotes are harder to program.
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What are the buttons on my mirror for?
If you have a manual rearview mirror, there’s a switch or tab at the bottom. It should move up and down. Changing the switch’s position changes the way the mirror works. Flip it one way and you’re in daytime driving mode, with everything crisp and clear.
What are the buttons on the rearview mirror BMW x3?

What is the red thing on my BMW mirror?
The red indicator light on the rear view mirror will flash every 2 seconds meaning your car is locked and the alarm system is switched on.
What do the 3 buttons on my rear view mirror do?
They are for garage door opener, etc. They are home link buttons for garage doors or gates.
How do you unlock the hidden menu on a BMW?

How do I know if my mirror is auto dimming?
Drive in the dark. They turn blue if they are auto dimming. When they dim, there is a border around them. If there is not a border of different contrast, they’re not dimming.
What is the auto button on my rear view mirror?
When driving after dark, the automatic dimming function reduces glare in the rearview mirror from headlights behind you. Press the AUTO button to turn this function on and off. This function cancels when the shift lever is in Reverse (R).
What are the home buttons on the rear view mirror?
The HomeLinkยฎ buttons are discretely integrated into the rearview mirror, which also features auto-dimming and a compass. The auto-dimming rearview mirror automatically dims distracting light from the cars behind. A very practical accessory when driving in the dark.
How do I adjust my BMW rear view mirror?

What does the M stand for on a BMW?
The “M” in the BMW M Series stands for “Motorsport”, and the M Series was originally created to facilitate BMW’s racing program. Over time, the BMW M program began to supplement their vehicle lineup with modified vehicle models, which are now available to the general public.
How do you turn off the reverse tilt mirror on a BMW?

What is BMW clown nose?
After doing some searches I noticed that the red light underneath the rear view mirror is called the clown nose. It is part of the pre-wiring for the factory alarm system.
How does BMW rearview mirror work?
Sensors on the mirror run through a photodiode or camera that trigger a response from the microprocessor, changing the mirror to deflect the glare and keep your eyes safe from the glare. There are a ton of new driver safety features available with the latest vehicles.
Does BMW have rear view mirror camera?
In the BMW’s case, such a work-around is impossible, since there is no traditional mirror. The side views come from tiny cameras mounted where the door mirrors used to be, while the central aft view is provided by a camera located above the rear window.
What is the green light on my rear view mirror?
I’ve read the manual, the green light indicates that the auto dimming is on and there is also a button on the mirror to turn on and off.
How do I program my rear view mirror remote?

How does an auto dimming rear view mirror work?
The magic is in the electrochromic layer of the mirror. When beams of light from the car behind you hit the sensor, it sends a signal to the control circuit, which in turn sends a low voltage charge to the electrochromic layer, causing it to darken and reduce reflection.
How do I access the hidden menu in iDrive?
To access the hidden menu in CIC / NBT iDrives, press the “Menu” button to reach the main screen, then press the iDrive controller in the up position for 8 seconds.
Where is the iDrive on a BMW?
iDrive is the name given to BMW’s infotainment system, and the scroll wheel wheel used to control it that sits between the two front seats.
How do I code my BMW?

How do I turn off auto dimming mirror on BMW?
A small piece of black tape will effectively block the sensor. Thank you Captainaudio! The auto dimming is triggered by a small round sensor built into the top center of the rear view mirror. Block this sensor and the mirrors will not dim.
What is auto dimming feature?
What is auto-dimming IRVM? Auto-dimming mirrors are the special type of rearview mirrors that have the capability to dim the light reflecting from their surface. These mirrors reduce the glare of light coming from trailing vehicles significantly thereby reducing driver fatigue.
What is mirror dimming?
The auto-dimming rear view mirror offers greater safety when driving at night, as it stops you from being dazzled by traffic travelling behind. It consists of a mirror element and an electronic system that detects light from in front and behind by means of photo sensors.
What is night mode on rear view mirror?
The night mode cuts out glaring lights when driving at night by darkening the most of the reflection. You will still see the headlights of cars behind you clearly but without the glare. This is especially helpful for drivers with astigmatism.