
These are the three markings L, O, and R, which are the adjustment switches for the rearview mirror, used to adjust the rearview mirror. Turning to L adjusts the left rearview mirror, O turns it off, and R adjusts the right rearview mirror. The car rearview mirror reflects the situation behind, beside, and below the car, allowing the driver to indirectly see these positions clearly and expanding the driver's field of vision. Here is additional information: 1. Installing rearview mirrors: Each vehicle should have a rearview mirror installed on the left and right sides inside the car, with their position and angle adapted to the vehicle model. 2. Before starting the car: The driver must observe through the rearview mirror whether there are any vehicles approaching from the side or rear and other traffic conditions behind, in order to make quick and accurate judgments and decisions. Starting blindly may lead to collisions. 3. Driving on multi-lane roads: When vehicles frequently change lanes, it is even more important to accurately observe the traffic conditions behind and to the side through the rearview mirror at all times. If there is a vehicle approaching from behind, do not change lanes. If a vehicle is overtaking from the side or rear, temporarily refrain from overtaking the vehicle ahead.









I've worked in the repair shop for eight years and often encounter beginners asking about this. The common L and R on cars stand for Left and Right respectively. For example, pushing the turn signal lever to the left (L) activates the left turn signal, while pushing it to the right (R) activates the right turn signal. The L button on the mirror adjustment switch controls the left mirror angle, and R handles the right one. Tire positions are also labeled as L (left wheel) and R (right wheel). Nowadays, some high-end models even divide the audio channels into L (left ) and R (right speaker). Remembering these letter indicators will make operating various switches while driving much smoother.

Last time when teaching my daughter to drive, I specifically explained this symbol. Pushing the turn signal lever forward activates the R (right) turn signal, while pulling it backward turns on the L (left) signal. If you see L and R letters on the rearview mirror adjustment button, pressing L adjusts the angle of the driver's side mirror. Also, note that wheels may be marked with L or R—don't mix up their positions during installation. Sometimes, the audio system uses L/R to distinguish between left and right channels, which enhances stereo playback effects.

Let an experienced driver tell you how to remember these two letters: Pushing the turn signal lever forward is for Right turn, and pulling it backward is for Left turn. The rearview mirror button marked L adjusts the left mirror, while R controls the right one. The R on the gear shift lever under the steering wheel stands for Reverse gear, and L stands for Low gear. When changing tires, pay attention to the L and R markings on the wheel hub; installing them incorrectly can affect driving stability.

As an audio modification enthusiast, I pay special attention to the LR markings in cars. In the audio system, L stands for the left channel , and R represents the right channel speaker. Adjusting the EQ sound effects by separately setting the left and right channel parameters can create a more three-dimensional sound field. Additionally, the R on the gear shift below the steering wheel stands for reverse, while L is the low gear used for climbing hills. The rearview mirror heating function also features buttons marked with L and R symbols.

I noticed many car owners overlook small details on their vehicles. The windshield washer nozzles are marked with L and R to distinguish left and right; the air vent blade adjustment knobs also have L and R labels to differentiate left and right zones; even the seatbelt buckles come in L-type and R-type installation positions. Nowadays, tire pressure monitoring screens display data for each tire using L and R indicators. Remembering these small markings can make daily car use much more convenient.


