I just noticed there is a button on my stereo for what I believe is a multi-disc CD changer. Where the heck is the changer located???

 

Well if you have one it will be in the trunk. However you more then likely don't because I have a feeling you have at least opened your trunk before and would have noticed a black or grey box in there.

It might be attached right underneath the rear deck or it might be on the floor of the trunk to the side.

The HU will have the button even if you don't have the changer.

 

I've got a wagon, so there really isn't a trunk.

 

I have no idea where it would be in the wagon. I would assume on the floor like mine is in my sedan. Maybe one of the side panels if there are any in the back.

 

Most of the radio's came with the setup for the changer. Most cars didn't have them.
The glove box would be one place they would put it. The other on a wagon is in the rear pocket on the left side. Like next to the spare tire area the wooden panel that lifts out.