Mercedes-Benz C300 heater issues with warm air turning cold, floor vents not blowing heat, mid-level blowing heat briefly on Mercedes-Benz C300

Some Mercedes-Benz C300 owners report experiencing issues with their heater, such as warm air turning cold and floor vents not blowing heat. These problems may be attributed to a broken heater blower motor, which can cause inconsistent airflow and temperature regulation. Additionally, fluctuations in heat output could stem from thermostat issues, leading to unexpected cold air. Some owners also note that a failed heater blower motor resistor can result in mid-level blowing heat briefly before the problem recurs. Addressing these potential causes is crucial for maintaining optimal performance and comfort, and regular maintenance is recommended to prevent more costly repairs in the future.