Rear seat back release beetle

under seat will see lever latch pop it and seat will fold

Sound silly but here we go. Pull the side that works. Listen for the clicks at the latch release on the seat. With the seat down, look at how it releases. There is a lever that moves back and forth. That locks and unlocks around the latch or striker. Now try the side that doesn't work, If it's clicking at the latch the cable end may have come off. Find the same kind of lever on the bad seat, with a screwdriver it will release where the cable releases at the latch. I hope that helps. If you have to repair the cable, that's really self explanatory when you examine the system. Good Luck.

You can purchase a new cable here. Just be sure you select the correct cable as it appears there are two different ones.
Parts found for 2014 Chevrolet Captiva Sport Rear Seat Trim Carpet Seat...

I just ran into the exact problem with my 2004 Suburban. Once I got the seat to lay down all the other mechanisms worked as they should and I could get the seat in and out as usuall. I found this post below which explained how to get the seat down. Wish I could take credit for figuring it out on my own but I can't.
"After working on it for a couple of days here is what I did to remove the 3rd row seat.
On the rear lower right and left side there are plastic covers, if you push the seat material forward a little you can see a hole where a nut holds it on, remove the nut. On the left side pull back the plastic cover and you can see the wire and the lever that releases the seat. With my foot holding up the #1 release lever on the right side I used an open end wrench to push forward the left side lever and the seat folded down.
I then used the #2 and #3 levers to remove the seat.
To view the whole cable, open the lower seat cover, it is an overlapping plastic clip, My problem was a loose cable, similar to a brake cable on a bicycle, after fixing it I have had no problems."
To remove the nut I used an 8mm socket wrench. My problem was not a loose cable but the #1 mechanism wouldn't pull up all the way, I'm guessing because that left side locked in out of order. I pushed that left side lever down with a hard tool and had my 5yr old daughter pull up on the #1 and the seat folded right down.
Hope this helps if you havn't already gotten it fixed.

If you have rear seats that fold down you can access the latch mechanism from the left side rear seat....if you are flexible. pull the corner of the seat forward to allow your arm to slide in behind. about 14-16" in, feeling up inside the trunk you can feel 3 quarter size holes in the sheet metal. The second hole has the cable release arm. stick your finger up there are pull towards you. this will release the seat allowing it to fold down. Crawl into the trunk. there is a glow in the dark release handle on the inside of the trunk lid to open the trunk.

In my '04 corolla I can unlatch the left passenger seat back by reaching behind the left seat back and sticking my finger up into the second of 3 quarter sized holes. my arm is about 15" stuck in and reaching up into the trunk about 6" back. Feel around for the holes. You can pull the latch at that point, but...you have to be flexible.

If you have rear seats that fold down you can access the latch mechanism from the left side rear seat....if you are flexible. pull the corner of the seat forward to allow your arm to slide in behind. about 14-16" in, feeling up inside the trunk you can feel 3 quarter size holes in the sheet metal. The second hole has the cable release arm. stick your finger up there are pull towards you. this will release the seat allowing it to fold down. Crawl into the trunk. there is a glow in the dark release handle on the inside of the trunk lid to open the trunk. Note, these are instructions for an '04 corolla but I think it should work

Its not in the trunk,Its either in the glove box or on the floor left side of drivers seat

Got it, with the help and eyes of my wife. The rear latch releases as the seat back is lowered. This release is ALMOST seat back down (about 3 inches above the seat bottom). As the seat back lowers, apply constant lift on the rear latch, and it will release as the seat back lowers. Hard-won knowledge - I think I invented some bad words in the process.

its the cable from the handle to the seat mechanism that locks the seat in place. an easy fix with new cable from vw .i think its a dealer only part !