A coolant leak may develop form the Radiator due to degradation of its plastic components. Replacement of the failed radiator will be necessary.
Car Problem Reports
Mercedes-Benz 190E Radiators Break Due to Degradation of the Plastic Tanks and Fittings
Mercedes-Benz 190E Problem
Engines Affected: 2.3L 4 Cylinder, 2.6L 6 Cylinder
Average Mileage: 170,000 mi (125,000 mi - 215,000 mi)
Visitor, 1991 Mercedes-Benz 190E, 2.6L 6 Cylinder, 125,000 mi
2500 miles after a head gasket replacement the radiator developed a significant leak