Back seat (middle belt) belt stuck and unable to release.

Check that the seat belt has got jammed & this is what can be stopping the seat's staying up as they have something stopping the seats locking into place. Best Wishes, Malcolm Campbell.

On my 2016 Ford Escape the rear passenger seat folded down and would not hold back up the problem was that the seat belt buckle pivoted down below the level of the seat when I try to raise the back of the sheet the seat belt buckle would prevent it it ended up crushing the plastic on the seat belt buckle preventing it from working the hold the seat belt I was able to repair the seat belt buckle with a screwdriver regular Style and a cigarette lighter the soft in the plastic back up so it would stay in position

The problem:
The set belt stop has been lost so the seat belt retracts too far when the seat is laid flat. When laid flat the release mechanism lock as it should when not level. So the seat cannot be raised up as the belt is too tight and locked.
The Solution:
1) Push the two little clips to release and remove the headrests.
Pull the grey lever on the right of the seat base, lift seat base up and forward toward the front seat..
2) See two red capped leversat the back of the two seat hinges and lever them to the upward position, this releases the seat.
Rock the very heavy seat unit upwards and lift complete unit upwards.
3) Take it out of the car and turn 180% so that the back of the seat and base are in the upward position and the seat belt will pull out as it should
4) Replace the missing belt locking stop (I used a tie pin permanently fixed using super glue).
5) Fold seat back down and test then either re-fit seat unit or leave out to decrease fuel consumption..

Opel astra ,never a problem with these excelent cars ,now is it a seat belt stuck or a seat stuck forewards problem as the question is a bit conflicting .

The problem:
The set belt stop has been lost so the seat belt retracts too far when the seat is laid flat. When laid flat the release mechanism locks as it should when not level so the seat cannot be raised up as the belt is too tight and locked.
The Solution:
1) Push the two little clips to release and remove the headrests.
Pull the grey lever on the right of the seat base, lift seat base up and forward toward the front seat..
2) See two red capped leversat the back of the two seat hinges and lever them to the upward position, this releases the seat.
Rock the very heavy seat unit upwards and lift complete unit upwards.
3) Take it out of the car and turn 180% so that the back of the seat and base are in the upward position and the seat belt will pull out as it should
4) Replace the missing belt locking stop (I used a tie pin permanently fixed using super glue).
5) Fold seat back down and test then either re-fit seat unit or leave out to decrease fuel consumption..

That just happened to our 05 equinox. We have car seats so one of the seats was reclined just a bit. This will cause the seatbelt to lock. We took out the car seat, folded down the other seat and folded it back. It cause the locked seat to release and unfold.

The fix is:

• remove the seat bench,
  
• unscrew the bolt attaching the seat belt to the body,
  
• return the seat back to its upright position and make sure it latches
• reattach the seat belt
• replace the seat bench

To prevent this from happening again:

• Leave the seat belt latch in its receiver when not in use.
  

Here is how I fold down the back seat of my 1995 Rodeo. First thing I do is remove the headrests on the back seat. Then I place my knees (and all my weight) on the middle of the seat (bench), and pull on both belts straps. If this is done properly, I will hear each strap release. (sort of a click). As soon as I hear it release, I stand up as best I can while at the same time pulling up the seat. I then manage to step out of the Rodeo while letting the seat fall forward. After that, I am able to drop the other part of the seat into the forward position.

middle seat belt shouldn't have anything to do with it. The seat locks down for stowage in the rear cargo area. you can pull the release handle on the back of the seat to release it back into the up position.

my "06 had the same problem when I bought it used. I have had success pushing the seat BACK first while holding down the lever, then pushing it all the way forward