in previous cars, I’ve had hard to trace rattles and clunks, it’s a million mile long shot but worth checking anyway
on drive take up, I’ve had issues with noise from door hinges and check straps where they mount to the A pillar, also movement where the door latch engages at the B pillar.
it’s always handy to apply a little lube at these points.
On the A3, on the underside of the front doors, thwre is a bar which inserts to the sill, maybe worth applying a little lube/light grease here also.
As said, a long shot but can’t do any harm