Finally, the entire apparatus must be pulled to open the door. The handle requires extra thought, and fine motor skills that many users don't have. If a user is driving and notices the clock is wrong, they want it fixed as soon as possible, so that they won't be late, or too early, or just so that they can be aware of the time. As in the above example, most cars make setting the clock when it is required nearly impossible. I wouldn't ask any driver to continue their trip while trying to find a pointed object with which to set their car clock.
Drivers have to find a special tool and spend some time playing around with the mechanism.
Since the clock is so important to users' daily lives, it should be easier to set. A reader pointed out that if a clock is to easy to set, the time may be accidentally changed. Perhaps clock setting buttons should be hidden behind a labeled door. The same reader also mentioned that correct time on the clock isn't imperative for proper operation of the vehicle. However, it is imperative for proper operation of the driver.