I found a ipod in a ditch when I went off the road in a snow storm and it works but I cant get the files off it or add to it since Im not the orginal owner. How do I get around it?

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1986 300SDL, 211K,Dealership serviced its whole life
1991 190E 2.6(120k)
1983 300D(300k)
1977 300D(211k)