I have seen several doors on M715's and wagoneers that have been opened to hard and sprung the door. You have to push the door closed and it no longer shuts with a gentle nudge.
It is a pretty easy repair. I have been cleaning up Mikes truck and both passenger doors were sprung. I have successfully repaired both of them where they will shut like they should.
First make sure all the rubber bumpers and gaskets are in place. Verify the door alignment by examining the gaps and the reveal of all the panels. They should be flush or close to it. Check the latch function. Does the door enter the latch and not collide with the latch frame on it's way in.
Most importantly, do the body lines line up? Now is the time to address that.
Start there...
Make 2 square metal plates. 1/4 thick 2x2 inches.
Look inside the cab hinge pocket. There is a bolt way in back to support the door hinge. Place one plate on edge back against the bolt head. Place the second plate on the other hinge. Don't drop them!!! A magnet on a string works. You are making an interference fit for the hinge.
Close the door till it hits both plates. Make sure they did not move.
With both hands spread wide top to bottom over the door start pushing with your body weight pressing evenly on both hands. Remove the plates and test close the door. Continue till the door closes like it should.
You have to push hard to return the bend. The curved mounting surface inside the door is what bends. It is curved for strength, but it is single layer.
Final check the body lines and door alignment and look closely at the latch. No dragging or movement of the door in any direction. The latch should home the door inward on the second safety catch to the rubber bumpers and be flush with the tub with no rattle back and forth.
Doors get worn out, so sometime a compromise has to be done.
Have fun