The battery is dead and I cant get into trunk can someone tell me what to do on 1995 BMW 325i

its a convrertable

Asked by for the 1995 BMW 325i
Remove/fold down back seat i guess!... should be a release inside the trunk... need a flashlight!!... Don't really know for sure.... never owned a car that I couldn't take a key and open the trunk!!!... OR had the battery in the back end!! Nev