Mercedes-Benz E300 engine overheating issue causing shutdown on Mercedes-Benz E300

Some Mercedes-Benz E300 owners report experiencing engine overheating that leads to shutdowns while driving at normal speeds or in traffic, often accompanied by the radiator fan spinning at high speed afterward. These overheating issues can stem from several factors, including cooling system leaks, damaged radiator fans, broken water pumps, or clogged coolant hoses, which trap heat inside the engine. Additionally, a common concern among E300 Diesel owners is the melting of the main sensor wire harness, which can cause shutdowns; thus, checking for cracked insulation on wires is advisable. Many new owners may initially attempt to resolve overheating by replacing the radiator cap or thermostat, but it is crucial to address the underlying maintenance of the cooling system to prevent these issues. Proper coolant flow, inspecting for wire harness damage, and regular cooling system maintenance are essential to avoid engine overheating and subsequent shutdowns in the Mercedes-Benz E300.