
To adjust the rearview mirrors inside a car, follow these steps: 1. For the central rearview mirror, adjust the horizon reflection to the center of the mirror and position the reflection of your right ear to the left edge of the mirror. 2. For the left rearview mirror, adjust the horizon reflection to the center of the mirror and position the reflection of the left side of your car to occupy the right quarter of the mirror. 3. For the right rearview mirror, adjust the horizon reflection to two-thirds of the mirror's height and position the reflection of the right side of your car to occupy the left quarter of the mirror. The function of car rearview mirrors is to reflect the conditions behind, beside, and below the car, thereby expanding the driver's field of vision.

When I first bought a car, I also didn't know how to adjust the rearview mirrors for maximum safety. It's actually quite simple: First, adjust the seat to a comfortable position and hold the steering wheel with your left hand to simulate the driving posture. For the interior rearview mirror, ensure the entire rear windshield is within your field of view, with the horizon aligned to the center of the mirror. The left exterior mirror should show a small portion of your car's door handle, with the car body occupying one-quarter of the mirror and the remaining space for the rear view. The right side is the trickiest to adjust—move the seat slightly to the right before adjusting, keeping the car body at one-quarter while the ground occupies two-thirds of the mirror. I usually turn my neck left and right after adjusting to check for any blind spots at intersections. On rainy days, I deliberately lower the mirrors to better see roadside puddles. Every time a different driver takes the wheel, readjustment is necessary. Using a marker to note the position on the adjustment knob saves a lot of hassle.

During driving school, the instructor taught me a trick for adjusting rearview mirrors: first ensure your head naturally rests against the headrest before adjusting for accuracy. The interior rearview mirror should show the complete outline of all three rear headrests, which helps cushion head impact during a rear-end collision. When adjusting the left mirror, place your right hand on the passenger seat armrest for balance, positioning the horizon line in the center of the mirror. Pay special attention to blind spots when adjusting the right mirror—I test this on empty roads: when a vehicle appears in the side mirror, immediately turn your head to check; if it's not visible, the blind spot is too large and requires readjustment. The rearview mirror heating button icon features a wave over a square—remember to use this function frequently in winter to prevent frost. The mirror angle can shift with tire pressure changes; low pressure may unexpectedly raise the viewing angle by two or three degrees.

A few days ago, while helping my cousin adjust his new car's mirrors, I discovered a few tricks: It's easier to test the electric adjustment buttons after starting the vehicle. Begin adjusting when there's about a fist's distance between the driver's head and the roof. Adjust the interior rearview mirror so that you can see the headlights of the car behind without being dazzled. The left mirror should allow you to clearly see the outlines of both front wheels of the car behind, which helps in accurately judging the distance. When adjusting the right mirror, rolling down the window makes it easier to find the right angle, allowing about one-third of the white line from the adjacent lane to appear at the edge of the mirror. If you have dark tinted film, remember to increase the mirror's brightness at night. When the auto-dimming function is on, avoid covering the sensor with your hand, as it will keep the mirror at high brightness and dazzle your eyes.


