How do I remove the headrests in order to install seat covers?

In order to repair this you must have the seat back cover removed, since you really don't know what is broken inside and it is a safety issue I would have the dealer repair this.

There is a Pin hole on one side of the headrest in the plastic base. You have someone put a small Allen wrench in the hole till it presses against the metal spring and also on the release on the other side, then pull the headrest out. You will have to press on the spring to put the head rest back in also.

When you lift the headrest to the up position on the plastic sleves at the bottom of the metal rods for the headrest you should find a small hole on one side.Take a small pin or nail and push in the hole and lift up that will release the headrest

I looked into new headrest for my 2005 Grand Cherokee with the monitors installed in them. I had mine off but couldn't remember how i did it. But I got the instuctions from the the company with the new headrest and they linked me to a video online. The company was on ebay. I remember that it was really simple

Im doing the same thing.. Push the headrest full forward, then lift hard to get past last indent in pole.. This worked for the front as well.. i also could not find a hole to push

Most volvo headrest can be removed by releasing the catches which are on the back of the headrest on some models and on the front on others I believe on 960 they are on the back. To release the seat on a 960 look where the shafts should be then follow it down on the back where the seat back top stops then goes in press around that area you should be able to find the catch there pull up on the headrest while releasing the catch you have to do this on both sides. The headrest should come off this also works on 740 and 760 series the volvo 780 is a different story the only way to get the headrest off on that is to disassemble the seat

There is a plastic cover, about 1 1/8" diameter, on the base of the post on each side. You can remove it with a screw driver by carefully prising upwards at the edge. They just clip down.
Once these are lifted away from the seat, you will see the wire clip that locks the headrest into the seat. Remove the clip on each post, and you can then remove the headrest.
Reassembly is the reverse.

press and keep holding the release button between top of seat and the headrest and pull the headrest all the way up

There should be a button on the base of the headrest to raise & lower it. Push the button, and lower it. With the button pushed, raise the headrest, and pull hard. They ARE tight.

check for a release button between top of seat and the head rest