Search All New Vehicles

Search All Used Vehicles

Mercedes-Benz Check Engine Light

2023 Mercedes-Benz GLC Interior

Your casual trips around Troy can be interrupted at any time by the Mercedes-Benz check engine light. The alert can indicate a significant issue that needs immediate attention or simply points you to a minor problem with a quick fix. Whatever the alert may be, you’ll want to make sure it’s addressed in a timely manner so you aren’t slowed down by reduced engine performance or damage to essential components. At Mercedes-Benz of Rochester, we’ll cover the Mercedes-Benz check engine light codes, so you’re ready to take appropriate action to ensure your safety.



Reasons Behind the Engine Light of a Mercedes-Benz

While you may be familiar with the low gas warning light or the tire pressure symbol, seeing the Mercedes-Benz check engine light illuminated during your Rochester commutes can cause some alarm. You’ll find that some issues are more serious than others, all issues should be addressed. Let’s explore some of the common reasons why the Mercedes-Benz check engine light comes on:

  • Loose Gas Cap: After you fill up at the pump, you may be forgotten to secure your gas cap or it may be broken or missing entirely. If there’s an issue with your gas cap, your vehicle may suffer from reduced fuel pressure, allowing fuel vapors to escape. That can lead to a reduced fuel economy during Rochester trips and an increase in harmful emissions.
  • Failing Catalytic Converter: The check engine light in a Mercedes-Benz also can indicate an issue with the catalytic converter. The catalytic converter is an essential part of the vehicle’s emission system, removing toxic carbon monoxide. This is especially important in higher-mileage vehicles. If the catalytic converter is clogged or there is a failure in the system, it can severely impact your fuel economy and overall performance.
  • Faulty Spark Plugs or Spark Plug Wires: The spark plugs create a hot spark that ignites the air-and-fuel mixture in the cylinder and starts the engine. If your vehicle has damaged spark plugs or spark plug wires, it can cause your engine to misfire. While replacing spark plugs is a routine part of the Mercedes-Benz maintenance schedule, malfunction in the system can lead to reduced fuel economy, poor performance, and even prevent it from running altogether.
  • Faulty Oxygen Sensor: The oxygen sensor is what provides valuable air-fuel mixture information to the ECU. Repeated exposure to hot exhaust gas over time can cause a malfunction that prevents the vehicle’s computer from sending the engine the right amount of fuel. If an engine has too little fuel, the vehicle is at risk of total engine failure, while too much fuel will lead to excessive smoke and odor.
  • Faulty Mass Air Flow Sensor: Similar to the oxygen sensors, the Mass Air Flow (MAF) sensor limits the amount of air entering the engine, ensuring a proper air-fuel mixture. When it is exposed to dirty or particle-rich air, the Mercedes-Benz check engine light alerts drivers of a malfunction in the sensors and the related damage it can cause to your engine.

When to Schedule Maintenance for the Mercedes-Benz Check Engine Light

As you can see, the Mercedes-Benz check engine light codes alert you to serious malfunctions in your vehicle. When the light illuminates during your Sterling Heights commutes, it’s best to schedule service as soon as possible. Our certified technicians in the Mercedes-Benz of Rochester service center have the most up-to-date diagnostic equipment to address the issue. There are a few scenarios that can help you quickly troubleshoot the severity of the alert to determine what’s wrong:

  • If the check engine light only comes on in certain conditions, take note of any performance issues while the light is on. A change in performance means you should drive the vehicle as little as possible until you bring it in for service. It can mean that your car or SUV is on the verge of failing and you run the risk of your vehicle not starting again.
  • When the check engine light is constantly on, the intelligent vehicle’s onboard diagnostic system has already determined that an issue needs to be addressed. While it may seem like your vehicle is performing as normal, you should get it in for service as soon as possible.
  • When the check engine light is constantly on and there is a drop in performance, your vehicle may already be entering “limp mode.” This mode automatically activates to restrict your vehicle’s functions to prevent additional damage. This is another case where you should immediately drive or have your vehicle towed to a service center.
  • A constant blinking of the check engine light is an indicator of a major issue with the vehicle. In this case, you should pull over when safe to do so and get a tow truck to a service center if one is not nearby.

Schedule Service with Mercedes-Benz of Rochester!

The check engine light on your Mercedes-Benz is not something to be ignored. Trust your service to our team of certified technicians at Mercedes-Benz of Rochester so you can return to your shopping trips and weekend adventures without concern. Our team uses genuine OEM parts for high-quality, lasting repairs and you can save on your next visit with our available new vehicle specials.


More from Mercedes-Benz of Rochester

  • 2024 Mercedes-Benz GLC Configurations & Price

      The new Mercedes-Benz GLC is designed to ensure you and your passengers can enjoy comfortable Troy adventures. It features the latest Mercedes-Benz technology and outstanding interior dimensions so you have something to look forward to on your drives. But how much is the Mercedes-Benz GLC? The new Mercedes-Benz GLC 300 SUV starts at $48,600…

  • 2024 Mercedes-Benz C-Class Trim Levels: An Overview

      Whether you prefer luxurious comfort on your Troy commute or a sporty, thrilling ride to get your blood pumping, there’s a Mercedes-Benz C-Class model that’s right for you! So in this breakdown, we’ll consider the various configurations for the 2024 Mercedes-Benz C-Class and see what kinds of standard features you can enjoy in your…

  • 2024 Mercedes-Benz C-Class Features: Safety, Infotainment, & Comfort

      Luxury. Deluxe. These are but two words of many that you can use to describe the features that adorn the interior of the 2024 Mercedes-Benz C-Class. In this overview of the Mercedes-Benz C-Class features, we’ll provide a snapshot of the technologies that enable the luxury and safety that you expect from a vehicle carrying…

Saved Vehicles

You don't have any saved vehicles!

Look for this Save icon

Once you've saved some vehicles, you can view them here at any time.


Your garage is empty.
Save some vehicles to get started!
Mercedes-Benz of Rochester 42.6724135, -83.1321802.