Earlier this afternoon while enroute to Delaware City Volunteer Fire Company, No. 1, Inc., Station 15 for a cover, Rescue Engine 7 pulled up on a working car fire passed the toll plaza of the Delaware Memorial Bridge. The crew was on scene for approximately 20 minutes before continuing onto our cover assignment for station 1-5. The Rescue Engine turned out for 3 additional calls including a cardiac arrest, C/O alarm, and a motor vehicle crash on Rt 1 SB.