My driver's side door lock won't unlock from the outside using a key but will lock from the inside and outside with the key. does it need to be oiled or does it need a new mechanism? The trunk lock has been acting up too. can anyone offer advise?

by the way it is a 93 740i with the door lock problem

see under body & interior
doorlock bracket
doorlock mechanism
http://bmwe32.masscom.net/

thanks