Sometimes those things can be half bad or set up wrong. It nay be working like it should exposing exorcised functions.
Locking while door ajar "beep"- normal, probably didn't work before because of messed up security box. Grinding not good...no clue, but maybe something that hasn't been exercised. As to steering and bakes, that shouldn't have anything to do with the security do-dad (unless there is a security function to disable power assist). That is just a vacuum set up that should work when your motor is running.
None of this should be you problem?
Regards, PK
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