2015 Mercedes-Benz ML63 AMG AC Isn't Working

Common Causes of AC Malfunctions in Your 2015 Mercedes-Benz ML63 AMG and How to Fix Them

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Reviewed by
Bo Fader
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 2015 Mercedes-Benz ML63 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 short circuit in the wiring can disrupt the electrical signals needed for proper operation of 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 2015 Mercedes-Benz ML63 AMG?

To effectively diagnose the AC issue in your 2015 Mercedes-Benz ML63 AMG, start with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by inspecting the AC system for any signs of refrigerant leaks, as low refrigerant levels are a common cause of poor cooling performance. Next, examine the climate control electrical system, ensuring that all wiring and connections are intact, as electrical faults can lead to malfunctions. The AC compressor is another critical component to assess; verify that it is operating correctly, as a faulty compressor can severely impact cooling efficiency. Additionally, consider other potential causes, such as issues with the AC system's components or controls, which may require further investigation. If these steps do not resolve the issue, or if you encounter difficulties during your diagnosis, it is wise to consult a professional technician who specializes in Mercedes-Benz vehicles for a more thorough evaluation. By following this structured diagnostic approach, you can effectively identify and address the AC problems in your vehicle.

How urgent is it to address the non-functioning AC in a 2015 Mercedes-Benz ML63 AMG?

Addressing a non-functioning AC in your 2015 Mercedes-Benz ML63 AMG is not just a matter of comfort; it is a pressing concern that requires immediate attention. A malfunctioning air conditioning system can lead to an uncomfortable driving experience, especially during extreme weather conditions, which can distract you from the road and compromise your safety. Moreover, the underlying causes of AC failure, such as refrigerant leaks or electrical issues, can escalate if left unresolved, potentially leading to more severe and costly repairs. Ignoring these symptoms may result in further damage to the AC system, which could ultimately affect other vehicle components. Therefore, it is crucial to prioritize the diagnosis and repair of your AC system to ensure your vehicle remains safe, comfortable, and fully operational. Taking proactive steps now can save you from more significant headaches and expenses in the future.

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2015 Mercedes-Benz ML63 AMG AC Not Working | RepairPal