Why is heater not working in 2003 Mercedes e320?

A heater not working in a 2003 Mercedes E320 could be due to several issues. Common causes include low coolant levels, a faulty thermostat, or a malfunctioning heater core. Additionally, issues with the climate control system or a broken blower motor might also prevent warm air from circulating. It’s advisable to check these components or consult a mechanic for a thorough diagnosis.