This is because the issue is not with the door, and not even with the control the knob has over the stuck latch. You’ll need this to buy a new knob or handle.
This plate covers the operational hardware of the door handle, as well as the screws.
Door handle cover plate stuck. This can be done with a screwdriver (flat or phillips) to remove all screws of the door handle’s plates. There are two kinds of interior locksets. Remove the cover plate of the rear license plate lamp and the bulb, and connect a battery or battery charger to the exposed terminals.
Loosen the two screws that are under the cover plate. Ive pushed hard trying to release the pressure on the latch, will try again. First remove the inner knob/handle.
Ensure that the door is unlocked before doing so. That key hole cover is made to pop off easily so you can insert you keys in there. You'd have to order it from the dealer unless you can find some on ebay.
Start by removing the door handle. Use a phillips screwdriver to screw in the loose screws or tighten a loose plate. A door latch stuck due to a jamming latch will have no real variation between how the latch moves when it is pressed in, or when the handle is turned (both when the door is open and when it is shut).
Close the door and look at. I had this door off 2 wks ago to reglue some loose wxstrip on the door's leading edge, so the hinge screws should not be tough to loosen this weekend. More likely is that one door only is having trouble.
After that, there are a few simple tests you can conduct that will diagnose what is causing the sticking door handle. Measure backset from edge of door to centre of hole (usually 60 or 70mm). Suitably line the holes up to where the handle will be fitted on the door making sure it is straight (refer to page 1, tech sheet, for centres) and make 2 holes in the door where you have marked.
The mechanism at the back of the handle (where the spindle is inserted) can often slightly protrude from the rear face of the back. How to remove the faceplate from a lever door knob. Push the handle’s pressure release in with a screwdriver and pull it off.
Look for a small slot in the side of the door knob or door handle where it connects to the cover plate or look on the side of the cover plate where it sits flush against the door. The idea here is to remove your door’s handle and trying to pull the latch back from within the latch mechanism, to get the door open. Use a philips head screwdriver to unscrew them.
The plunger that is attached to the latch should now be accessible. Take ‘fitting b’ and screw it into the handle, both at the top and the bottom (as shown in diagram 3). 2) loosen off fixing screws on your door handle.
Open the door and look for obstructions in the door lock plate like loose screws. They usually have large escutcheon plates, about 2 1/2” by 5 1/2”, with the doorknob centered over a keyhole. If the handles now work properly, there is most likely a binding or misalignment problem.
The cover plate behind the door knob or lever may be round or rectangular, depending on the handle’s design. Pry off the cover plate if it has a notch. Try loosening off the fixing screws on the handle back plates or roses.
Using needle nose pliers or a screwdriver should get the plunger pulled into the release position. To test this, firstly open the door and check that there are no obvious obstructions on the tubular latch plate such as loose screws, or signs of internal parts of the latch or lock poking through. To avoid damage to door, it may first be worthwhile running a utility knife around edges of plate to break paint seal.
Maybe you can ask you dealer if they can repair it under warranty. You can usually twist or pry it off with a flathead screwdriver to expose the screws. In order to get at the screws that hold the handle to the door, you need to expose them by removing the plate that surrounds the lever handle, also known as a rose.
Unscrew latch and plate from edge of door, then pop out latch. Pull out the part that the knob/handle was attached to. If that does not work then the general module or relay may be failing.
And i agree the hinge cover plate is the cheapest/easiest part to sacrifice. It is possible to reopen a deadlocked door from the inside but it is not easy.