2019 Mercedes-Benz AMG GT 53 Smells Like Gas

Addressing Fuel Odors in 2019 Mercedes-Benz AMG GT 53

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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
0%
40% chance it's the
Emissions Control System
0%
45% chance it's
Something else
The most common reasons a 2019 Mercedes-Benz AMG GT 53 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 2019 Mercedes-Benz AMG GT 53 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.

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 initial diagnostic steps should be taken for a 2019 Mercedes-Benz AMG GT 53 that smells like gas?

When faced with a gasoline smell in your 2019 Mercedes-Benz AMG GT 53, it's crucial to adopt a systematic diagnostic approach. Start by visually inspecting the vehicle for any obvious signs of fuel leaks, particularly under the car and around the engine compartment. Next, examine the fuel lines and connections for any wear or loose fittings, as tightening these can often resolve minor issues. Don’t overlook the fuel tank; any damage or leaks here can contribute significantly to the odor. Additionally, faulty fuel injectors may be the culprit, so consider having them checked if the smell persists. The evaporative emissions control system is another area to investigate, as malfunctions can lead to gas odors. Utilizing a diagnostic scanner to check for error codes related to the fuel system can provide further insights into the problem. If these steps do not yield results, consulting a qualified mechanic is advisable, as they possess the expertise to diagnose and repair more complex issues effectively. By following this structured approach, you can efficiently identify and address the source of the gas smell in your vehicle.

What could be causing a gas smell in my 2019 Mercedes-Benz AMG GT 53?

If you notice a gas smell in your 2019 Mercedes-Benz AMG GT 53, it’s crucial to understand the common problems that could be at play. One of the primary concerns is a fuel leak, which may stem from damaged fuel lines, faulty fuel injectors, or issues with the fuel tank itself. Additionally, the evaporative emissions system, designed to manage fuel vapors, can malfunction and contribute to the odor. Another potential source is the exhaust system; leaks or a failing catalytic converter can emit fuel smells. Engine misfires, which allow unburned fuel to escape into the exhaust, may also be a culprit. Lastly, overfilling the gas tank can lead to fuel spillage, resulting in a noticeable gas smell inside the vehicle. While some of these issues may be manageable for a DIY enthusiast, it’s essential to approach repairs with caution and consider consulting a qualified mechanic for a thorough inspection to ensure safety and proper vehicle function.

How urgent is it to address the gas smell in my 2019 Mercedes-Benz AMG GT 53?

Addressing a gas smell in your 2019 Mercedes-Benz AMG GT 53 is of utmost urgency due to the serious safety risks it poses. A gasoline odor often indicates a fuel leak, which can lead to fire hazards given the flammable nature of gasoline. Moreover, inhaling gasoline fumes can have detrimental effects on your health, causing symptoms such as dizziness, headaches, and nausea, which can escalate with prolonged exposure. Ignoring this warning sign not only jeopardizes your safety but can also result in further damage to your vehicle, leading to more extensive and expensive repairs. Therefore, if you detect a strong gas smell, it is imperative to stop driving immediately and consult a qualified mechanic to diagnose and rectify the issue. Taking swift action is essential to safeguard both your well-being and the integrity of your vehicle.

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