2012 Mercedes-Benz ML63 AMG Engine Is Stalling

Common Causes of Engine Stalling in Your 2012 Mercedes-Benz ML63 AMG and How to Resolve Them

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Reviewed by
Andrew Hajjar
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 2012 Mercedes-Benz ML63 AMG 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 2012 Mercedes-Benz ML63 AMG 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.

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.

What diagnostic steps should be taken to address the stalling issue in a 2012 Mercedes-Benz ML63 AMG?

When tackling a stalling issue in your 2012 Mercedes-Benz ML63 AMG, it's essential to adopt a methodical diagnostic approach. Start by checking for any warning lights on the dashboard, particularly the Check Engine Light, as this can lead you to specific error codes that indicate the underlying problem. Using an OBD-II scanner, retrieve these codes to gain insights into potential issues. Next, inspect the fuel system, including the fuel pump, filter, and injectors, as any malfunction here can directly affect engine performance. Following this, examine the ignition system components such as spark plugs and ignition coils to ensure they are in good working order. It's also crucial to test the battery and charging system, as electrical failures can contribute to stalling. Don’t overlook the air intake system; check for obstructions or leaks that might hinder airflow. Additionally, evaluate critical sensors like the mass airflow and throttle position sensors to confirm they are functioning correctly. Lastly, inspect vacuum hoses for any damage or disconnections that could lead to a loss of engine vacuum. By systematically addressing these areas, you can effectively diagnose and resolve the stalling issue in your vehicle.

What are the common problems that could cause the engine to stall in a 2012 Mercedes-Benz ML63 AMG?

When diagnosing engine stalling issues in a 2012 Mercedes-Benz ML63 AMG, it's essential to consider several common problems that could be at play. One of the primary culprits is a failing fuel pump, which may not supply adequate fuel to the engine, leading to stalling. Additionally, the crankshaft position sensor is critical for the ignition system; if it malfunctions, it can disrupt engine operation. Another component to check is the mass airflow sensor, as any issues here can affect the air-fuel mixture, resulting in stalling. The ignition coil is also vital; a faulty coil can cause misfires that may lead to the engine stalling unexpectedly. Furthermore, the throttle position sensor plays a significant role in engine performance, and any faults can impact its functionality. Lastly, don't overlook the possibility of vacuum leaks, which can severely affect engine performance and contribute to stalling. By being aware of these potential issues, DIY enthusiasts can take proactive steps to troubleshoot and maintain their vehicle, ensuring a smoother driving experience.

How urgent is it to address the engine stalling issue in a 2012 Mercedes-Benz ML63 AMG?

Addressing the engine stalling issue in a 2012 Mercedes-Benz ML63 AMG is of utmost urgency due to the serious safety risks it poses. When an engine stalls unexpectedly, it can lead to a sudden loss of power, which is particularly dangerous in high-traffic situations or at high speeds, increasing the likelihood of accidents. Moreover, neglecting this issue can result in the vehicle becoming completely inoperable, leaving you stranded and potentially facing costly towing and repair bills. Engine stalling often indicates underlying mechanical or electrical problems that, if left unaddressed, may escalate into more severe issues, further compromising the vehicle's performance and safety. Regular maintenance and prompt repairs are essential not only for the longevity of your vehicle but also for ensuring a safe driving experience. Therefore, it is crucial to take immediate action to diagnose and resolve any engine stalling issues to maintain the reliability and safety of your Mercedes-Benz ML63 AMG.

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2012 Mercedes-Benz ML63 AMG Engine Stalling Solutions