Barg Family

I am trying to finf information on my Great Grandfather his Name was Fred
Deitherick Barg. He was born 12/13/1875 in Hannover, Germany. He was raised
in Essen Germany when he was 15 he left Germany to come to the United States.
I am trying to find his birth record and the port and ship he sailed here on.
Hope someone can help me.
       Cindy Barg Giannelli