This is on the bottom of my rear view mirror and does nothing from what I can tell it pushes up into the mirror like a toggle, there is also a little circle in the top of the glass of the mirror that looks like a sensor or what a hidden camera might look like.

It's a self dimming mirror so high beams in your rearview won blind you. That little circle you say looks like a camera is a light sensor that senses if lights it sees is too bright and dims accordingly.

The button on the bottom activates/deactivated the self-dimmin aspect of it. Take a drive at night and activate the self dimming and see what you think of it.

you can take a flashlight and shine it on that sensor to test if the mirror is working... if its working then you will see the mirror change to a darker color... if it does nothing with the toggle in both positions then you might consider replacing your mirror. i had to do this when i bought my rig as the autodim had gone bad... check arround at salvage yards and the like

Thanks for the help. Dodge came up with a cool feature like that in 1998 but didn't discover rear disc brakes for Durangos until 2003!

if you really want rear disk brakes on your rig look online... there's a conversion kit thats not too spendy

Honestly I prefer my rear drum brakes. Less maintenance and worries IMHO.

i agree i prefer drums on the rear also, hell, in my experience they even stop better than 4 wheel disc brakes

I will rarely pull trailers and it isn't a huge deal to me if I have 4-wheel disc or not just being a 98 I figured technology would have caught up. I know it is a sports car by my 94 z28 had 4-wheel disc.

for some reason trucks are still using the drum brakes, someone once told me its bc they dissipate heat better (larger surface area on the drum than there is on the discs) idk if its true or not, but considering what heat does to stopping power it does make some sense

shrpshtr325-that sounds about right, I used to work at a truck shop and every semi on the road uses drum brakes so they must work somewhat better.