2014 Mercedes-Benz GL550 Won't Start

Resolve Starting Issues for 2014 Mercedes-Benz GL550

Find Repair Location
Reviewed by
Bo Fader
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 2014 Mercedes-Benz GL550 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 2014 Mercedes-Benz GL550 won't start?

When your 2014 Mercedes-Benz GL550 refuses to start, it's crucial to approach the problem methodically to pinpoint the cause. Begin by checking the battery, as a weak or dead battery is often the most common culprit. Ensure that the battery terminals are clean and securely connected. Next, inspect the key fob to confirm it is functioning correctly, as a malfunction here can prevent the vehicle from recognizing the key. It's also important to verify that the gear shift is in the Park or Neutral position, as many vehicles have safety features that inhibit starting if the transmission is not correctly set. Pay attention to any warning lights on the dashboard, as these can provide valuable clues about underlying issues. If the engine doesn’t crank despite a charged battery, the starter motor may be at fault, so testing it is essential. Additionally, check your fuel levels; sometimes, the simplest explanation is a lack of fuel. Lastly, if your vehicle is equipped with an engine immobilizer, ensure that it is not activated, as this can also prevent the engine from starting. By following these steps, you can effectively diagnose the starting issue and take the necessary actions to resolve it.

What are the common problems that could cause a 2014 Mercedes-Benz GL550 to not start?

When troubleshooting starting issues with a 2014 Mercedes-Benz GL550, it's essential to consider several common problems that could be at play. A weak or dead battery is often the first suspect, as it can prevent the vehicle from starting altogether. If the battery is in good condition, the next component to check is the starter motor, which is responsible for turning the engine over. Additionally, issues within the fuel system, such as a clogged fuel filter or a malfunctioning fuel pump, can hinder fuel delivery, making it difficult for the engine to start. The ignition switch is another critical element; if it fails, the car may not respond when the key is turned. Worn-out spark plugs can also lead to ignition problems, resulting in starting difficulties. Furthermore, a defective fuel pump relay can disrupt the flow of fuel to the engine, while issues with the Engine Control Unit (ECU) can introduce software glitches that affect the starting process. By systematically checking these components, DIY enthusiasts can effectively diagnose and resolve starting issues with their GL550.

How urgent is it to address the starting issue in a 2014 Mercedes-Benz GL550?

When dealing with starting issues in a 2014 Mercedes-Benz GL550, the urgency of addressing the problem cannot be overstated. If your vehicle is experiencing symptoms such as slow cranking or unusual clicking noises, it is essential to act quickly. These warning signs often indicate underlying issues that, if left unresolved, could lead to complete failure to start, leaving you stranded and potentially causing further damage to the vehicle's electrical system. Moreover, safety should always be a priority; a malfunctioning starting system can pose risks not only to the driver but also to passengers, especially if the problem escalates while on the road. By addressing these issues promptly, you not only enhance your safety but also engage in preventive maintenance that can save you from more significant and costly repairs down the line. Therefore, if you notice any starting issues, it is advisable to investigate and resolve them as soon as possible to ensure the longevity and reliability of your GL550.

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.