My seat is upright.
The problem isn't "seeing the quarter panel" - that is easy.
The problem is sighting down the side of the car, parallel to the longitudinal axis. Only the outermost edge of the stock mirror can do this. When backing into stuff, you want to be sighting down the side just like you do with shooting or surveying.
Example: you are backing up straight and you are trying to drive between two other parked cars that are very close. To determine what clearance you have, you sight down both sides and it will be obvious.
Any truck driver will tell you you have to be able to sight down the side of your trailer to do any kind of parking or passing.
Last edited by Squid; September 28th, 2019 at 08:07 PM.