Ive been paraniod about this ever since Alan Started this thread having checked both my hinges everyweek for the last month and not being able to see any cracks i know no what to look for ........Chris, if you rub the pad of your index finger along the top of the hinge plate, where it bolts to the door, you'll feel the crack if it's present.
As for new doors, they wouldn't solve the problem anyway, unless they were re-designed models with a thicker plate at the attachment points.
Cheers,
Mike
Its only a thought as im no expert on these things ,but do you suppose Audi might have seen this as a future fault on the A2 , and stopped production rather abruptly as it could be rather a big headache for themselves as well as the unsuspecting A2 Owner ....