2013 Mercedes-Benz GL450 Smells Like Gas

Diagnosing Fuel Odor Issues in Your 2013 Mercedes-Benz GL450 and Essential Safety Measures

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
15% chance it's the
Gas Cap
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40% chance it's the
Emissions Control System
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45% chance it's
Something else
The most common reasons a 2013 Mercedes-Benz GL450 smells like gas are the gas cap, the fuel system, or the emissions control system.
  • Gas Cap: A loose or damaged gas cap can cause fuel vapors to escape, triggering the check engine light and potentially affecting fuel system pressure.
  • Emissions Control System: A faulty emissions control system can lead to increased hydrocarbon emissions and trigger the check engine light due to malfunctioning components like the EGR valve or O2 sensors.
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 2013 Mercedes-Benz GL450 smells like gas?

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 failing catalytic converter can cause a vehicle to fail emissions tests and turn on the check engine light. The exhaust might have an unusual smell. A restricted catalytic converter can result in a loss of engine power.

» LEARN MORE: How to tell if your catalytic converter is failing

The check engine light will illuminate any time there is a failed EVAP system test. This will be indicated by the various on-board diagnostics trouble codes that are stored in the vehicle's memory. Also, in some models, there may be a popping sound accompanying the check engine light, as the leak detection pump continuously attempts to pressurize the fuel tank. The canister may also cause difficulty starting the engine, a rough idle, and poor fuel mileage.

When the fuel filter begins to clog, the engine suffers from fuel starvation. This will cause a significant reduction in power and may also cause a misfire. These conditions may be intermittent, or constant and worsen over time. As the issue progresses, the engine may being to stall immediately after starting, fail to start, hesitate under throttle, or stall at particular angles on hills.

The check engine light will illuminate any time there is a failed EVAP system test. This will be indicated by the various on-board diagnostics trouble codes that are stored in the vehicle's memory. Also, in some models, there may be a popping sound accompanying the check engine light, as the leak detection pump continuously attempts to pressurize the fuel tank. A fuel tank leak may also cause difficulty starting the engine, a rough idle, and poor fuel mileage. When a fuel tank is simply corroded to the point of failure, the exterior tank condition rarely shows damage. The inside of the fuel tank will be rusted or corroded, and rust flakes or other debris may be floating in the fuel.

For most vehicles, the only symptom will be a check engine light or fuel tank filler cap light illuminating on the driver instrument cluster. This is to signal that there is an evaporative emissions (EVAP) leak. In some situations, the vehicle may take longer than normal to start, or, more rarely, the engine may not start at all. on-board diagnostic (OBD) trouble codes will refer to EVAP system failures such as a small or massive EVAP system leak. Lastly, the powertrain control module may notice a lean running condition, which could even lead to random and infrequent misfires.

What are the potential causes and diagnostic steps for a gas smell in a 2013 Mercedes-Benz GL450?

When dealing with a gas smell in your 2013 Mercedes-Benz GL450, it's essential to adopt a systematic diagnostic approach to identify the underlying issue effectively. Start with a visual inspection of the vehicle, focusing on areas where fuel leaks are most likely to occur, such as the fuel tank, fuel lines, and around the engine compartment. Next, check the fuel cap to ensure it is securely fastened and free from damage, as a faulty cap can allow gas vapors to escape. Utilizing a diagnostic scanner can help you uncover any error codes related to the fuel system or emissions components, providing valuable insights into potential problems. Pay particular attention to the evaporative emissions system, inspecting components like the charcoal canister and purge valve for any signs of malfunction. Additionally, examine the exhaust system for leaks or damage that could contribute to the gas smell. Finally, monitor your engine's performance for any irregularities, such as misfires or unusual fuel consumption, which may indicate deeper issues. By following this structured approach, you can effectively diagnose and address the source of the gas odor, ensuring your vehicle operates safely and efficiently.

What could be causing a gas smell in my 2013 Mercedes-Benz GL450?

If you're experiencing a gas smell in your 2013 Mercedes-Benz GL450, it's essential to identify the underlying issues that could be causing this problem. A fuel leak is one of the most common culprits, which may arise from a damaged fuel line, a malfunctioning fuel injector, or even a compromised fuel tank. Additionally, the evaporative emissions system, responsible for controlling fuel vapor release, might be malfunctioning, contributing to the odor. A loose or damaged fuel cap can also lead to fuel vapors escaping, creating a noticeable gas smell inside the vehicle. Furthermore, issues within the exhaust system, such as leaks or a failing catalytic converter, can result in gas odors infiltrating the cabin. Lastly, an engine misfire can allow unburned fuel to enter the exhaust system, exacerbating the smell. Given the potential safety risks and the impact on vehicle performance, it is crucial to address any gas smell promptly. Consulting a qualified mechanic for a comprehensive inspection and diagnosis is highly recommended to ensure your vehicle remains safe and functional.

How urgent is it to address the gas smell in my 2013 Mercedes-Benz GL450?

Addressing a gas smell in your 2013 Mercedes-Benz GL450 is not just a matter of inconvenience; it is a critical safety issue that demands immediate attention. Ignoring this warning can lead to severe consequences, including the risk of fire or explosion due to gasoline leaks, particularly in the confined space of your vehicle. Additionally, inhaling gasoline fumes poses serious health risks, such as dizziness and nausea, which can impair your ability to drive safely. If you notice a gas smell, it is essential to act quickly. Start by inspecting the fuel lines and connections for any visible leaks or damage. Check the fuel tank and the area around the fuel injectors, as these are common sources of leaks. If you are not comfortable performing these checks yourself, or if you cannot identify the source of the smell, it is crucial to consult a qualified mechanic. Prompt action not only protects your health and safety but also helps maintain the performance and longevity of your vehicle.

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