This step matters because your position determines the angles at which you look through the mirrors.
If you adjust your mirrors and then move your seat significantly, the viewing angles will change too.
Step 2: Set the Interior Rearview Mirror
Adjust the mirror in the middle of the windshield so you can see as much of the rear window as possible.
You should be able to observe traffic behind you without leaning or stretching.
The interior mirror is responsible for the area directly behind your vehicle. The side mirrors should complement that view by covering areas farther to the left and right.
Step 3: Adjust the Driver’s-Side Mirror
Here is where the technique differs from what many drivers were taught.
While parked safely, lean your head toward the driver’s-side window until it is close to or touching the glass.
From this position, adjust the left side mirror outward until you can just see the side of your vehicle along the mirror’s inner edge.
