Bob Neuwirth Born Robert Neuwirth On 20 June 1939 Died 18 May 2022 Was An American Folk Music Singer Songwriter Record Producer And Visual Artist. A Mainstay Of The Early 1960s Cambridge Massachusetts Folk Scene He Subsequently Became A Friend And Associate Of Bob Dylan Alongside Whom He Appears In D.A. Pennebaker's Documentary Dont Look Back And Dylan's Own Self-Referential Romantic Fantasy Cum Tour Film Renaldo And Clara. Neuwirth Assembled The Backing Band For Dylan's 1975 Rolling Thunder Revue. With Janis Joplin And Poet Michael McClure He Co-Wrote The Song Mercedes Benz.