bmy535i 89 , back door locked,, plz help

[nrg]

greetings guys,, i own a bmw 535i 89 model,, recently my car's back door has been locked n i cant open it in order to replace the lock,, any clues on how to open the door safely without damaging any thing?

[Bill R.]

the body and interior link. Here it is.

greetings guys,, i own a bmw 535i 89 model,, recently my car's back door has been locked n i cant open it in order to replace the lock,, any clues on how to open the door safely without damaging any thing?