Police officers on patrol spotted the parked Vauxhall Corsa in Blackhalve Lane, Essington, at around 11.50pm yesterday.
Inside they discovered the body of a 61-year-old man. His death is not being treated as suspicious.
The road was closed for much of this morning between High Hill and Wood End Road, causing delays during rush hour.
A police tent could be seen in the rural road.
Mike Chipchase, spokesman for Staffordshire Police, said: "During a routine patrol, officers came across a white Vauxhall Corsa parked in Blackhalve Lane, Essington at around 11.50pm on Tuesday.
"Sadly, a 61-year-old man from the Wolverhampton area who was inside the car died at the scene.
"His death is not being treated as suspicious and a report will be submitted to HM Coroner.
"Any witnesses are asked to call 101 quoting incident number 1028 of 22 August."