Mercedes-Benz GL350 Engine Is Stalling

Common Causes of Engine Stalling in Your Mercedes-Benz GL350 and How to Resolve Them

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Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Fuel System
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15% chance it's the
Air Intake System
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55% chance it's
Something else
The most common reasons a Mercedes-Benz GL350 engine is stalling are the fuel system, the air intake system, or the ignition system.
  • Fuel System: A clogged fuel filter or failing fuel pump can restrict fuel flow, resulting in poor engine performance and starting issues.
  • Air Intake System: A dirty or damaged air filter or a malfunctioning mass airflow sensor can restrict airflow, leading to reduced engine performance and efficiency.
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.

How much does it cost to fix a Mercedes-Benz GL350 engine is stalling?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

If the MAF sensor sends an erroneous signal, a few things happen. The engine's computer will trigger the check engine light, and the on-board diagnostic (OBD) trouble codes will reflect the airflow discrepancy noted by the MAF sensor. Depending on the reported volume of air, the engine may try to compensate for these conditions, causing the engine to burn excessive amounts of fuel and emit black smoke from the exhaust. In this case, the OBD trouble codes would also reference faults recognized by the exhaust oxygen sensors. The engine may also have issues with idling roughly, failing to start, stalling, hesitation, power loss, misfires, and fuel consumption.

»MORE: Signs of a failing mass airflow sensor

A faulty oxygen sensor is one of the most common causes of a check engine light. Symptoms may include a decrease in fuel mileage, hesitation or misfiring from the engine, rough idling or even stalling. A faulty sensor may cause the vehicle to fail an emissions test.

Any time there is an emissions fault the check engine light will be displayed. The purpose of the check engine light is to inform the driver that an emission related fault has been found, and that there are on-board diagnostic (OBD) trouble codes stored in the powertrain or engine control module. Additionally, since the emissions systems are so intertwined into engine control and transmission control systems, symptoms may include nearly any sort of drivability concerns. This may include harsh shifting, failure to shift, hesitation on acceleration, jerking, engine failure to start or run, loss of power, or any number of other drivability issues.

When the Check Engine Light comes on, you may experience engine performance issues such as poor acceleration, rough idling, or an engine that won't start. In some cases, no abnormal symptoms will be experienced. Other systems like the transmission or ABS can cause the Check Engine Light to illuminate and lights for those systems can come on at the same time. Similar lights may say "Check Engine Soon", "Malfunction Indicator Light" or just "Check". In rare case the engine can overheat.

Troubleshooting Engine Stalling Issues in a Mercedes-Benz GL350

When addressing engine stalling issues in your Mercedes-Benz GL350, begin by inspecting the ignition system, as a faulty ignition can lead to misfires and stalling. Check the spark plugs for wear or dirt, as these components are crucial for igniting the fuel; replacing them can often resolve stalling problems. Next, assess the fuel pump, since a malfunctioning pump can abruptly cut off power while driving. If you suspect a fuel pump issue, consult your local dealership, as they may offer free replacements for known defects. Additionally, keep an eye on the check engine light; if it’s illuminated, it could signal underlying problems that require immediate attention. Lastly, examine the Mass Air Flow (MAF) sensor by disconnecting it and observing any changes in engine performance, which can help identify if it needs replacement. By following this diagnostic approach, you can systematically identify and resolve the stalling issues, ensuring your vehicle runs smoothly and safely.

What Are the Common Causes of Engine Stalling in a Mercedes-Benz GL350?

When experiencing engine stalling in a Mercedes-Benz GL350, it's essential to understand the common problems that could be at play. A dirty air filter can restrict airflow, leading to performance issues, while a faulty fuel pump may prevent adequate fuel delivery to the engine. Additionally, bad spark plugs can cause misfires, resulting in stalling, and low fuel pressure or a clogged fuel filter can disrupt the fuel supply. For the 2014 GL350 Bluetec model, specific concerns such as overheating, loose gaskets, and oil leaks should also be examined, as they can contribute to engine performance problems. Furthermore, addressing issues with the mass air flow sensor is crucial, as it plays a significant role in regulating the air-fuel mixture. For those comfortable with DIY repairs, replacing spark plugs and ignition coils is a manageable task that can significantly improve engine reliability. Lastly, it's worth checking for any recalls related to your vehicle model, as these can sometimes reveal underlying issues that may lead to stalling. By systematically investigating these areas, GL350 owners can effectively diagnose and resolve stalling issues, ensuring their vehicle runs smoothly.

Why is the Engine Stalling in a Mercedes-Benz GL350?

When experiencing engine stalling in your Mercedes-Benz GL350, it is crucial to recognize the urgency of addressing the underlying issues. Ignoring symptoms such as irregular engine performance can lead to severe safety risks, including loss of control while driving, which could result in accidents. Additionally, problems like a faulty ignition system or fuel system concerns can escalate into more significant mechanical failures, potentially leading to costly repairs. For instance, if the ignition system is not functioning correctly, it may not only cause stalling but could also damage other engine components over time. Similarly, neglecting transmission problems can result in complete transmission failure, which is both dangerous and expensive to fix. Regular maintenance and prompt attention to warning signs are essential to ensure your vehicle operates safely and efficiently, preventing minor issues from developing into major headaches. By staying proactive and addressing these concerns, you can maintain the performance and reliability of your GL350 while ensuring your safety on the road.

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Mercedes-Benz GL350 Engine Stalling: Causes & Repairs