What are the reasons for the Mercedes-Benz W221 air conditioning not cooling?

[BriannaLynn]

Reasons for the Mercedes-Benz W221 air conditioning not cooling: Condenser issues: The condenser is a component that is often overlooked. After prolonged driving, a lot of dust accumulates on the condenser. If the car is frequently driven on dusty roads, even more dust will gather on the condenser. Excessive dust on the condenser significantly reduces its cooling efficiency, leading to poor air conditioning performance. Solution: Clean the condenser. Compressor not working: For example, the compressor capacitor may be damaged or malfunctioning. The A/C button activates the compressor. If the compressor fails to work, the air conditioning will not cool. Solution: Repair or replace the compressor. Air conditioning refrigerant leakage: If both the indoor and outdoor units are working, and the compressor is functioning, this is likely the cause. Solution: Replenish the air conditioning refrigerant.