An 83-year-old Hartland Township man died early Monday, two days after being struck by a vehicle he was repairing in Highland Township, authorities said.

Oakland County sheriff's deputies responded shortly before 8 m. Saturday to the parking lot of an auto parts store in the 3500 block of West Highland Road. The man had been working on a 1986 Jeep Cherokee while his 59-year-old daughter sat in the driver's seat, according to the Oakland County Sheriff's Office. When she was instructed to start the vehicle, it "unexpectedly launched forward" and struck her father, officials said.

The woman was identified by the sheriff's office as a Highland Township resident. The man was transported to McLaren Oakland Hospital, where he was pronounced dead.

The incident remains under investigation by the Oakland County Sheriff's Office Crash Reconstruction Unit.

"A family tragedy on so many levels," Sheriff Michael Bouchard said in a statement. "One of the most important things we can do when tragedy occurs is to look for lessons that will prevent them in the future."

Investigators do not believe alcohol, drugs, or speed were factors. They are examining whether the driver's unfamiliarity with the Jeep's manual transmission or a mechanical problem may have contributed to the vehicle's movement.

The sheriff's office urged anyone performing vehicle maintenance to take precautions, including ensuring everyone is clear before starting the engine, confirming the transmission is in park or neutral, engaging the parking brake, and staying out of the vehicle's path.