2022 Mercedes-Benz E350 Smells Like Gas

Common Causes of Gas Smells in Your 2022 Mercedes-Benz E350 and Essential Safety Precautions

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Reviewed by
Bo Fader
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 2022 Mercedes-Benz E350 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 E350 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. 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 2022 Mercedes-Benz E350 smells like gas?

When faced with a gas smell in a 2022 Mercedes-Benz E350, it's essential to adopt a systematic diagnostic approach to identify and resolve the issue efficiently. Start by checking for visible leaks around the vehicle, as any puddles or wet spots can indicate a fuel leak. Next, inspect the fuel cap to ensure it is securely tightened, as a loose or damaged cap can contribute to gas odors. Moving under the hood, examine the fuel lines and connections for any signs of wear or damage, as compromised fuel lines can lead to unpleasant smells. Additionally, consider the condition of the fuel injectors, as faulty injectors may also be a source of the odor; having a mechanic assess them can provide clarity. Don’t overlook the fuel tank itself; any cracks or damage could be the culprit behind the gas smell. Finally, using a diagnostic scanner to check for error codes related to the fuel system can help pinpoint specific issues. By following this structured approach, you can effectively diagnose and address the gas smell in your vehicle, ensuring a safer and more pleasant driving experience.

What could be causing a gas smell in a 2022 Mercedes-Benz E350?

When you notice a gas smell in your 2022 Mercedes-Benz E350, it's vital to investigate the underlying causes to ensure your safety and the vehicle's performance. Common issues include fuel leaks, which can arise from various sources such as faulty fuel injectors, damaged fuel lines, or even cracks in the fuel tank. Each of these problems can lead to fuel escaping and creating a noticeable odor inside the car. Additionally, malfunctions in the evaporative emissions system, designed to control fuel vapors, may also contribute to the smell. Addressing these issues promptly is crucial, as they not only pose safety risks but can also lead to more significant mechanical problems if left unresolved. For a thorough diagnosis and effective resolution, consulting a qualified mechanic is highly advisable.

How urgent is it to address a gas smell in a 2022 Mercedes-Benz E350?

When you detect a gas smell in your 2022 Mercedes-Benz E350, it is imperative to act swiftly due to the serious implications of neglecting this issue. The presence of gasoline fumes not only poses an immediate fire hazard but also raises significant health concerns, as inhaling these fumes can lead to dizziness, headaches, and other serious health complications. Furthermore, allowing the problem to persist can result in extensive damage to your vehicle's fuel system or engine, leading to costly repairs that could have been avoided with timely intervention. Mercedes-Benz emphasizes the importance of maintaining high safety standards, and addressing any unusual odors aligns with their recommendations for vehicle upkeep. Therefore, if you notice a gas smell, it is crucial to have your vehicle inspected by a qualified mechanic without delay to ensure your safety and the longevity of your car.

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2022 Mercedes-Benz E350 Smells Like Gas: Causes & Solutions