Car locked, battery dead; how do you get in? on 1998 BMW 528i

Car was parked and locked for a period of time. The battey lost charge, and now the key will not open the car door or trunk where the battery is located. How can you open the car or the trunk to access the battery.

Asked by for the 1998 BMW 528i
1 answer
Insert the key into the barrel of the door barrel or trunk barrel and turn accordingly as you would with most cars which do not have remote central locking fitted.