2018 Mercedes-Benz AMG GT S AC Isn't Working

Common Causes of AC Malfunctions in Your 2018 Mercedes-Benz AMG GT 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 2018 Mercedes-Benz AMG GT 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 steps to diagnose the AC issue in a 2018 Mercedes-Benz AMG GT S?

To effectively diagnose an AC issue in a 2018 Mercedes-Benz AMG GT S, start with the simplest solutions before progressing to more intricate assessments. Begin by checking the air filters, as dirty or clogged filters can significantly hinder airflow and cooling efficiency. Next, inspect the refrigerant levels; low refrigerant can lead to inadequate cooling, so ensure they are at the manufacturer-recommended levels. Following this, examine the AC compressor for any visible signs of damage or wear, as a malfunctioning compressor can severely impact performance. It’s also crucial to test the AC controls to confirm they are functioning correctly and communicating with the system. Additionally, look for any leaks in the AC system, as these can cause refrigerant loss and affect cooling. Finally, evaluate the electrical components, including fuses and relays, to ensure they are operational. By systematically following these steps, you can effectively diagnose and address AC issues in your vehicle, ensuring optimal performance and comfort.

What are the common problems that could cause the AC system to fail in a 2018 Mercedes-Benz AMG GT S?

When tackling the AC system in a 2018 Mercedes-Benz AMG GT S, it's essential to be aware of several common problems that can lead to system failure. One prevalent issue is refrigerant leaks, which can significantly reduce the system's cooling efficiency. If you notice a lack of cool air, checking for visible signs of refrigerant leakage around the hoses and connections is a good starting point. Another critical component is the compressor; if it fails, the refrigerant won't circulate properly, leading to inadequate cooling. Listen for unusual noises when the AC is running, as this could indicate a compressor issue. Electrical problems, such as faulty wiring or malfunctioning sensors, can also disrupt the AC's operation, so inspecting the electrical connections for wear or damage is advisable. Additionally, a clogged or blocked condenser can impede airflow, so ensure that the condenser is clean and free of debris. Lastly, if the blower motor is not functioning correctly, it may fail to distribute cool air effectively, which can be tested by checking the fan's operation at various settings. By understanding these common issues and their symptoms, DIY enthusiasts can take proactive steps to maintain and repair the AC system, ensuring optimal performance in their Mercedes-Benz AMG GT S.

How urgent is it to repair the non-functioning AC in a 2018 Mercedes-Benz AMG GT S?

When faced with a non-functioning AC in your 2018 Mercedes-Benz AMG GT S, the urgency of repair cannot be overstated. A reliable air conditioning system is essential for maintaining a comfortable driving experience, particularly during sweltering summer months or on extended journeys. Beyond comfort, the safety aspect is critical; driving in extreme heat without AC can lead to distractions and discomfort, which may compromise your focus on the road. Additionally, neglecting AC repairs can adversely affect your vehicle's resale value, as prospective buyers often look for well-maintained features, including climate control systems. Furthermore, delaying repairs could result in more severe mechanical issues, leading to costly fixes down the line. Therefore, addressing AC problems promptly is not just about comfort; it’s a vital step in ensuring your safety, preserving your vehicle's value, and preventing further complications.

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2018 Mercedes-Benz AMG GT S AC Problems & Solutions