2015 Mercedes-Benz CLS63 AMG S Won't Start

Resolve Starting Issues for 2015 Mercedes-Benz CLS63 AMG S

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Reviewed by
Aisha
Written by RepairPal Car Genius
Updated January 14, 2025
0%
38% chance it's the
Battery
0%
27% chance it's the
Alternator
0%
20% chance it's the
Starter
0%
15% chance it's
Something else
The most common reasons a 2015 Mercedes-Benz CLS63 AMG S won't start are a dead battery, an alternator problem, or failed starter.
  • Battery: A weak or failing battery can result in difficulty starting the engine and electrical system malfunctions.
  • Alternator: A failing alternator can result in insufficient electrical power, leading to battery drain and electrical system malfunctions.
  • Starter: A faulty starter motor or a weak battery can prevent the engine from cranking properly, leading to starting issues.
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 diagnostic steps to take when a 2015 Mercedes-Benz CLS63 AMG S won't start?

When faced with a situation where your 2015 Mercedes-Benz CLS63 AMG S won't start, it's essential to adopt a systematic diagnostic approach to identify the root cause effectively. Begin by checking the battery, as a dead or weak battery is often the simplest and most common issue that can prevent your vehicle from starting. Next, ensure that there is sufficient fuel in the tank, as low fuel levels can lead to starting difficulties. After confirming these basics, inspect the key fob to rule out any issues with its functionality, as a malfunctioning key fob can also hinder the starting process. Moving on, examine the ignition system components, including spark plugs and ignition coils, to ensure they are in good condition. Utilizing a diagnostic scanner to check for error codes can provide further insights into any underlying problems. Additionally, inspect the starter motor for signs of failure, as a faulty starter can prevent the engine from cranking. Finally, assess the fuel delivery system to ensure that fuel is reaching the engine properly, as issues like clogged fuel filters can also contribute to starting problems. By following this structured approach, you can effectively diagnose and address the starting issues with your Mercedes-Benz CLS63 AMG S.

What are the common problems that could cause a 2015 Mercedes-Benz CLS63 AMG S to not start?

When troubleshooting a 2015 Mercedes-Benz CLS63 AMG S that won't start, it's crucial to consider several common problems that could be at play. One potential issue is leaks, which can disrupt various systems within the vehicle, leading to starting failures. Additionally, software glitches can interfere with the car's electronic systems, preventing it from starting properly. While body damage may not directly cause starting issues, it can indicate underlying problems that affect overall vehicle performance. Furthermore, scratches at the bottom of the car might suggest hidden damage that could impact functionality. Lastly, specific cable issues, such as those related to the right camshaft sensor, can also contribute to starting difficulties. Addressing these issues promptly through regular maintenance and timely repairs is essential for ensuring the vehicle operates smoothly and to prevent future starting problems.

How urgent is it to address the starting issue in a 2015 Mercedes-Benz CLS63 AMG S?

When dealing with starting issues in a 2015 Mercedes-Benz CLS63 AMG S, understanding the urgency of the situation is paramount for any DIY enthusiast. If the vehicle fails to start completely, immediate action is necessary to prevent being stranded or causing further damage to the engine and electrical systems. Intermittent starting problems, while seemingly less urgent, can escalate if left unchecked, leading to more severe complications that could compromise the vehicle's reliability. Conducting a diagnostic check is a wise first step, as it can pinpoint the underlying cause of the issue and help gauge how urgently it needs to be addressed. Additionally, safety should always be a priority; neglecting starting problems can result in dangerous situations while driving. Regular maintenance and prompt attention to these issues not only enhance the vehicle's performance but also save you from costly repairs in the future. Therefore, addressing starting issues swiftly is essential for ensuring the safety and longevity of your Mercedes-Benz CLS63 AMG S.

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2015 Mercedes-Benz CLS63 AMG S Won't Start | RepairPal