Door locked shut; motor broklen and manual latch jammed.

The actuator/latch is bad. Basically a spring in it is not tight enough to close it.

Hi chance are the mechanism inside door jamming. Short of forcing off the inner panel in order to clean lubricate etc I find the best way to get this open is to get someone to keep activating your central locking open and shut while you simply keep trying the door handle at the same time and this can some times just catch the latch in just the right position to get the door open ( you dont need to forcefully be pulling on the handle as the latch will either simply click over on the fine spring latch mechanism or not force is not going to help).
Once and if you manage to get door open take off the inner door card panel and oil lubricate mechanism. rather than then shut door simply use a screw driver on latch to test and worth then working back and forth. If still jamming replace latch.

Your latch assembly may be frozen, or the door actuator faulty (a common problem on this vehicle).

Check out the following forum posts:

The basic problem:

http://forum.mpvclub.com/viewtopic.php?t=24351&highlight=door+actuator

Photos of the latch assembly:

http://forum.mpvclub.com/viewtopic.php?t=16431&highlight=panel+door+locked

How to disassemble the door panel (if you can open the door!):

http://www.mpvclub.com/diy.php?id=8

Like reference guide, check this procedure to Removal & Installation / Door Lock Motor...

The door lock motor is integral with the door latch. If the door lock motor is found to be defective, the entire door latch must be replaced.

1. Before servicing the vehicle, refer to the Precautions Section.
2. Roll the door glass down.
3. Disengage the 2 clips attaching the speaker grille to the door trim panel. (They are at the front of the grille, one near the top, and the other one at the bottom).
4. Remove the 3 large washer-headed screws surrounding the speaker.
   
   
   Fig. Fastener location for the door lower trim panel
   
5. Remove the access cover at the front of the door trim panel. Remove by prying at its rear edge.
6. Remove the red courtesy reflector from the lower tail of door. Disengage by prying at the screwdriver notch at the bottom of the reflector.
7. Remove the flag trim panel from the door by prying it off at the 2 attachment clip points.
8. Remove the 7 screws attaching the door trim panel to door:
   1. One screw is located at the lower rear screw pocket.
   2. Three screws are located along the bottom of the door.
   3. One screw is located inside the handle opening.
   4. One screw is located at the upper front.
   5. One screw is in the pull cup.
      
9. Disengage the 2 hidden clips attaching the rear of the trim panel; pry them off at the 2 attachment clip points.
10. Lift the trim panel upward and away from the door, disengage the trim panel from the upper retainer channel.
11. Disengage the clip attaching the latch linkage to back door handle.
12. Disconnect the electrical connectors as necessary, including the lower foot light, if equipped.
13. Remove the door trim panel from the door.
14. Remove the water shield (water dam) from the inside of the door.
    
    
    Fig. Remove the flag trim panel, door trim access cover, inside remote handle, and power door lock switch
    
15. Raise the door glass.
16. Remove the bolt and nut for the rear glass run channel and position the channel aside.
17. Disconnect the lock rod from the lock button bellcrank.
18. Disengage the lock and latch rods from the clips on the inner door panel.
19. Disconnect the lock and latch rods from the outside door handle and the key cylinder at the door latch.
20. Disconnect the wire connector from the power door lock motor.
21. Remove the screws attaching the door latch to the door end frame.
22. Remove the door latch and the power door lock motor from the vehicle.
    
    
    Fig. Expanded view of the door lock, latch, and linkage
    
    
    
    Fig. View of the door lock button, latch rod, lock rod, and door latch
    

Hope helps (remember rated this).

take a look at the latches, make sure they are grease good and all working,sometimes one of the latches freezes up, so the door is not completely latched,also you can adjust the striker to lock tighter,this is located on the body, at the top and bottom of the left side door,take a look and see if all latches are latching, use a screw driver to push them locked and see if latec will stay latched in the lock postion. good luck.

your gonna have to remove the inner dor panel and replace the latch lock assembly

The part in the door is called the Door Latch/Electric lock assembly,(If you don't have electric locks it's just called the door latch), The part in the door jam is called the striker assembly.

I would follow their recommendation as I had the same problem with my car. They unhooked the power to that door and it was fine. The problem was a short in the wiring in the door that was causing the problem. So maybe get them to check the wiring in the door as well.

you have bad door lock motor

this sounds like a stuck switch in the door lock assembly. it will make the locking system work like its got a mind of its own. The best fix is to first try cleaning the latch on the door it has a switch to tell the car if the latch is open/closed. Use an old tooth brush with some degreaser scrub the base of the latch on the door. After its cleaned up relube it with some white grease or dry graphite. Then try the lock again. If this doesn't solve it then the lock assembly has a faulty switch inside and replacement is the best option