2018 Mercedes-Benz S63 AMG AC Isn't Working

Common Causes of AC Malfunctions in Your 2018 Mercedes-Benz S63 AMG and How to Resolve Them

Find Repair Location
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 2018 Mercedes-Benz S63 AMG 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 2018 Mercedes-Benz S63 AMG?

When diagnosing an AC issue in a 2018 Mercedes-Benz S63 AMG, it's essential to adopt a systematic approach that begins with the simplest checks. Start by inspecting the air filters; clean or replace them if they are clogged, as this can significantly affect airflow and cooling efficiency. Next, verify the refrigerant levels in the system, as low refrigerant can lead to inadequate cooling. If the levels are fine, examine the AC compressor for any visible signs of damage or wear, as a malfunctioning compressor can hinder the entire system's performance. Additionally, testing the thermostat is crucial to ensure it is accurately regulating the temperature. Finally, conduct a thorough inspection for any leaks in the AC system, as these can lead to refrigerant loss and diminished cooling capabilities. By following these steps, you can effectively diagnose and potentially resolve AC issues in your vehicle, paving the way for a more comfortable driving experience.

What are the common causes of AC failure in a 2018 Mercedes-Benz S63 AMG?

Understanding the common causes of AC failure in a 2018 Mercedes-Benz S63 AMG is essential for any DIY enthusiast looking to maintain their vehicle's comfort. One of the most prevalent issues is refrigerant leaks, which can stem from damaged seals or components within the AC system. These leaks not only reduce cooling efficiency but can also lead to more significant problems if not addressed promptly. Additionally, electrical problems such as faulty fuses, relays, or wiring can disrupt the AC's functionality, making it crucial to check these components during troubleshooting. Another common culprit is compressor failure; since the compressor is vital for circulating refrigerant, its malfunction can result in a complete loss of cooling. Furthermore, a clogged or blocked condenser can impede airflow, significantly affecting the system's performance. Lastly, a faulty blower motor can prevent the proper distribution of cool air inside the cabin, leading to discomfort. By being aware of these issues and conducting regular maintenance, DIYers can ensure their AC system operates efficiently and effectively.

How urgent is it to address the non-functioning AC in a 2018 Mercedes-Benz S63 AMG?

When faced with a non-functioning air conditioning system in a 2018 Mercedes-Benz S63 AMG, it is crucial to act swiftly to avoid discomfort and safety risks. The AC system plays a vital role in maintaining a pleasant driving environment, especially during hot weather, making it essential for both driver and passenger comfort. Moreover, a malfunctioning AC can lead to foggy windows, significantly impairing visibility and increasing the risk of accidents. Ignoring these symptoms not only compromises safety but can also lead to more severe issues, resulting in costly repairs down the line. Therefore, for DIY enthusiasts, addressing the AC problem promptly is not just about comfort; it’s about ensuring safe driving conditions and preventing further damage to your luxury vehicle. Taking immediate action can save time, money, and enhance your overall driving experience.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.