1991 Mercedes Benz E320 the engine coolent light came and g

Engine Mechanical problem
1991 Mercedes Benz E320 6 cyl Automatic 76,000 miles

My husband took the car to a local shop that said it would neeed a new radiator and they kept it over night while the wait for parts he also quoted him a price of five hundred dollars. The net afternoon he returned the cr with good news the car did not need a radiator so it would not be as much. We drove the car today and had to return home because gage was reading hot all the green fluid he put in is now on the garage floor. The bill lists work done as Drive belt, A word I can't make out starting with t----pully, fan clutch, hose. No break down no labor 340.00 which my husband gave him in cash
now what