had wha ti believe to be the same problem as you with my 330's passenger door.
what broke was the cable that goes from teh exterior door handle to the lock. That clip is probably the clip that held the cable in place. Once it moved it prolly shifted out of its position causing it to break under the pressure of opening the door.
Basically you have to buy the door handle mechanism and replace the cable. Atleast thats the easy way. Actually replacing the entire machanism was more then i could do.
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**CGM **(Certified Garage Mechanic)