2023 Mercedes-Benz AMG GT 63 Smells Like Gas

Diagnosing Fuel Odor Issues in Your 2023 Mercedes-Benz AMG GT 63 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 2023 Mercedes-Benz AMG GT 63 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 2023 Mercedes-Benz AMG GT 63 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 initial diagnostic steps to take when a 2023 Mercedes-Benz AMG GT 63 has a gas smell?

When faced with a gas smell in your 2023 Mercedes-Benz AMG GT 63, it's essential to adopt a systematic diagnostic approach to identify and resolve the issue efficiently. Start by visually inspecting the area around your vehicle for any signs of gasoline leaks, such as puddles or wet spots, which can provide immediate clues about the source of the odor. Next, turn your attention to the fuel lines and connections under the hood; look for any signs of damage, wear, or loose fittings, as these can often lead to leaks. Don’t overlook the fuel tank itself; a thorough examination for any leaks or damage is crucial, as a compromised tank can emit strong gas odors. Additionally, check the fuel injectors to ensure they are functioning correctly and not leaking, as faulty injectors can contribute to the smell. It’s also wise to inspect the evaporative emissions control system, including components like the charcoal canister and purge valve, since issues here can lead to gas odors inside the vehicle. Finally, using a diagnostic scanner to check for error codes related to the fuel system can help pinpoint specific problems. By following this structured approach, you can effectively diagnose and address the gas smell in your AMG GT 63, ensuring a safer and more enjoyable driving experience.

What could be causing a gas smell in my 2023 Mercedes-Benz AMG GT 63?

If you're detecting a gas smell in your 2023 Mercedes-Benz AMG GT 63, it's crucial to identify the underlying cause to ensure both safety and vehicle performance. One of the most common culprits is a fuel leak, which can stem from damaged fuel lines, faulty fuel injectors, or issues with the fuel tank. Additionally, a loose or improperly sealed gas cap can allow fuel vapors to escape, creating a noticeable odor both inside and outside the vehicle. Another potential source of the smell could be related to the exhaust system; leaks or malfunctions in components like the catalytic converter can emit gas-like odors into the cabin. Furthermore, problems with the evaporative emissions system, designed to capture and recirculate fuel vapors, may also lead to a gas smell. Lastly, an engine misfire can result in unburned fuel exiting the exhaust, contributing to the odor. Addressing these issues promptly is essential, and while some DIY fixes may be possible, consulting a qualified mechanic for a thorough inspection is often the best course of action to ensure your vehicle remains safe and functional.

How urgent is it to address a gas smell in a 2023 Mercedes-Benz AMG GT 63?

Addressing a gas smell in your 2023 Mercedes-Benz AMG GT 63 is not just a matter of convenience; it is a pressing safety concern that should never be overlooked. Gas leaks pose a significant risk of fire or explosion, particularly in the confined space of a vehicle, where even a small spark can lead to catastrophic outcomes. Additionally, inhaling gas fumes can have serious health implications, including dizziness, headaches, and nausea, which can impair your ability to drive safely. Beyond immediate safety risks, neglecting a gas smell can lead to more extensive damage to your vehicle's components, resulting in costly repairs down the line. Therefore, if you detect a gas odor, it is imperative to seek professional assistance from a qualified mechanic without delay. Taking swift action not only protects your health and safety but also ensures the longevity and reliability of your luxury vehicle.

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