2020 Mercedes-Benz E63 AMG S AC Isn't Working

Common Causes of AC Malfunctions in Your 2020 Mercedes-Benz E63 AMG S and How to Fix Them

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
37% chance it's the
Refrigerant Leak
0%
21% chance it's the
Climate Control Electrical Issue
0%
12% chance it's the
AC Compressor
0%
30% chance it's
Something else
The most common reasons a 2020 Mercedes-Benz E63 AMG S AC isn't working are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor.
  • Refrigerant Leak: A refrigerant leak can occur due to damaged hoses, seals, or connections, resulting in decreased cooling efficiency in the air conditioning system.
  • Climate Control Electrical Issue: A faulty climate control module or a blown fuse could be causing the electrical issues in the climate control system.
  • AC Compressor: A faulty AC compressor may be due to a lack of lubrication, electrical issues, or internal mechanical failure, resulting in inadequate cooling performance.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

What are the initial steps to diagnose the AC issue in a 2020 Mercedes-Benz E63 AMG S?

To effectively diagnose the AC issue in your 2020 Mercedes-Benz E63 AMG S, start by checking the air filters, as clean filters are essential for proper airflow and cooling efficiency. Next, inspect the refrigerant levels; low refrigerant can significantly hinder the AC's performance, so ensure they are within the recommended range. Following this, examine the AC compressor for any visible signs of damage or wear, as a malfunctioning compressor can lead to inadequate cooling. Additionally, testing the thermostat is crucial; it should accurately regulate the temperature to maintain comfort inside the vehicle. Lastly, conduct a thorough inspection for any leaks in the AC system, as refrigerant loss can severely impact cooling capabilities. By systematically addressing these areas, you can effectively identify and resolve common AC issues in your vehicle.

What are the common problems that could cause the AC system to stop working in a 2020 Mercedes-Benz E63 AMG S?

When the AC system in your 2020 Mercedes-Benz E63 AMG S ceases to function, it can be frustrating, but understanding the common problems can help you diagnose the issue. One of the primary culprits is low refrigerant levels, which can lead to inadequate cooling or a complete failure of the system. If you notice that the air is not as cold as it should be, checking the refrigerant levels is a good first step. Another potential issue is a faulty compressor; if the compressor is not engaging, the system will not produce cold air. Electrical problems, such as blown fuses or faulty wiring, can also disrupt the AC's operation, so inspecting these components is essential. Additionally, clogged or leaking refrigerant lines can severely impact cooling efficiency, making it crucial to check for any visible leaks or blockages. Lastly, defects in the condenser or evaporator can hinder the heat exchange process necessary for effective cooling. By being aware of these common problems, you can take proactive steps to troubleshoot and potentially resolve the AC issues in your vehicle.

How urgent is it to address the AC failure in a 2020 Mercedes-Benz E63 AMG S?

When dealing with an AC failure in a 2020 Mercedes-Benz E63 AMG S, it is crucial to recognize the urgency of the situation. While it may not seem like an immediate emergency, neglecting the issue can lead to significant discomfort during hot weather, affecting both the driver and passengers. A properly functioning AC system is essential for maintaining a pleasant driving environment, especially on long journeys. Furthermore, delaying repairs can exacerbate the problem, potentially leading to more severe damage to the vehicle's cooling system, which could result in costly repairs down the line. Additionally, a malfunctioning AC can impair the vehicle's defrosting capabilities, compromising visibility and safety, particularly in colder climates. Therefore, addressing AC issues promptly not only enhances comfort but also safeguards against further complications, ensuring a safer driving experience.

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2020 Mercedes-Benz E63 AMG S AC Issues & Repairs | RepairPal