2022 Mercedes-Benz GLS63 AMG Smells Like Gas

Addressing Gas Smells in Your 2022 Mercedes-Benz GLS63 AMG and 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 2022 Mercedes-Benz GLS63 AMG 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 2022 Mercedes-Benz GLS63 AMG 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.

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 2022 Mercedes-Benz GLS63 AMG?

When dealing with a gas smell in your 2022 Mercedes-Benz GLS63 AMG, it's essential to adopt a systematic diagnostic approach to identify the underlying issue effectively. Start with a visual inspection of the vehicle, looking for any obvious signs of fuel leaks around the engine compartment or beneath the car. Next, check the fuel cap to ensure it is securely tightened and free from damage, as a faulty cap can often be the culprit behind gas odors. If these initial checks do not reveal the source, examine the exhaust system for any leaks or signs of wear, as issues here can also contribute to a gas smell. Utilizing a diagnostic scanner to check for error codes related to the fuel system or emissions components can provide further insights into potential problems. If the source remains elusive after these steps, it is advisable to consult a qualified mechanic for a thorough inspection, ensuring that any serious issues are addressed promptly. By following this structured approach, you can effectively diagnose and resolve the gas smell in your vehicle, maintaining both safety and performance.

What are the common problems that could cause a gas smell in a 2022 Mercedes-Benz GLS63 AMG?

If you detect a gas smell in your 2022 Mercedes-Benz GLS63 AMG, it’s crucial to investigate the source promptly, as it could indicate several underlying issues. One of the most common culprits is a fuel leak, which can occur anywhere in the fuel system, leading to a noticeable odor inside the cabin. Additionally, a faulty fuel injector may allow fuel to escape into the engine compartment, contributing to the gas smell. Another potential issue is a malfunction in the evaporative emissions system; leaks in this system can also result in a gas-like odor. Furthermore, an exhaust system leak can sometimes produce similar smells, as exhaust gases may enter the vehicle's interior. Lastly, don’t overlook the possibility of clogged air filters, which can disrupt the air-fuel mixture and lead to an unpleasant gas odor. If you’re comfortable with DIY diagnostics, start by visually inspecting these components for leaks or damage, but remember that for a thorough assessment and repair, consulting a qualified mechanic is always advisable to ensure your safety and the proper functioning of your vehicle.

How urgent is it to address a gas smell in a 2022 Mercedes-Benz GLS63 AMG?

Addressing a gas smell in your 2022 Mercedes-Benz GLS63 AMG is not just a matter of convenience; it is a pressing safety concern that requires immediate attention. Ignoring this issue can lead to severe consequences, including potential health risks from inhaling toxic fumes, which can cause dizziness, nausea, and other serious symptoms. Moreover, a gas leak may indicate a malfunction within the vehicle's fuel system, which could escalate into a dangerous situation, including the risk of fire or explosion if exposed to ignition sources. Therefore, if you detect a gas odor, it is crucial to act swiftly by consulting a qualified mechanic who can accurately diagnose and resolve the problem. Prioritizing this issue not only ensures your safety but also protects the integrity and performance of your luxury vehicle.

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2022 Mercedes-Benz GLS63 AMG Gas Smell Causes & Repairs