Is the check engine light on in your Mercedes-Benz for drivers driving on Las Vegas streets? It makes sense if you’re anxious. 

Is it safe to drive a Mercedes-Benz when the check engine light is on? If you notice that your car’s check engine lights are on, it’s typically not advised to drive; however, this can differ depending on the nature of the problem. 

To find out what’s happening under the hood, we advise scheduling an appointment with a Las Vegas Mercedes-Benz service shop like ours as soon as possible. The Mercedes-Benz dashboard lights should typically last a few hundred miles before breaking.

We will be able to investigate any check engine light codes that our diagnostic tools happen to trigger. But why specifically did your check engine light illuminate? After that, some people could be curious about “How to reset the check engine light.” 

But this blog post will tackle the common causes of a Mercedes check engine light. Discover what could be the reasons causing your check engine light to light on by reading our content!


What Does the Check Engine Light Mean?

The check engine light is one of the most often misunderstood lights or indications in your Mercedes-Benz. The onboard diagnostics system includes the check engine light, which appears in several ways. A “Check Engine” or an engine symbol might be displayed, or perhaps both at once. This light is a part of your vehicle’s diagnostic system and can be red or amber. Since the 1980s, onboard computers have progressively controlled and observed vehicle performance. They perform a multitude of functions for your Mercedes-Benz. Managing engine speed, adjusting the ignition timing of automatic transmissions, and applying stability control are a few of these. There are many issues that a check engine light detects. It could be as simple as a loose gas cap on your car or as persistent as a knocking engine.


Will the engine light automatically reset?

If the problem or error code that caused your Mercedes-Benz to turn on has been fixed, the check engine light should turn off by itself. For instance, if your loose gas cap is tightened, the check engine light will automatically go off if that is why it came on. Similarly, if the catalytic converter operated at its best and you drove a lot of stop-and-go traffic, the high converter utilization may have triggered the check engine light. 

Your Mercedes-Benz light usually turns off after 20 to 40 kilometers. You must bring it to All European Auto Repair to ensure that the light and code may be reset and double-checked if you drive more than that amount and the light remains on.

Common Causes of Check Engine Light in Mercedes

Replacing or tightening the gas cap could be the simple solution if the check engine light appears. Similarly, the check engine light may indicate a serious problem that could severely harm your engine and require expensive repairs. The vehicles’ makes and models will determine whether the check engine light is on or blinks. 

A constant glow usually indicates something less serious. Still, the constantly blinking check engine light indicates serious trouble with your car’s engine and that you should have it fixed immediately. 

We strongly advise against driving your Mercedes-Benz if the check engine light blinks and to make an appointment for Mercedes-Benz maintenance right away. The most common causes why your check engine light might illuminate are listed below:

  • The battery is dead or low. Your Mercedes-Benz’s battery is potent. Your car won’t start, play music, charge your phone, illuminate the road ahead, or light up the road without a car battery. Car batteries nowadays are extremely maintenance-free and have a far longer lifespan than they did several decades ago. The model of Mercedes-Benz that you drive will determine the cost of a new one, but first, look at our servicing offers and promotions.
  • You should replace your oxygen sensor (O2 sensor). The oxygen sensor measures the oxygen level in the exhaust system, sometimes called the O2 sensor. Excess oxygen in the exhaust system burns fuel faster, reducing fuel economy. What would happen if I didn’t change your O2 sensor? In addition to lowering your MPG, a malfunctioning sensor might harm your Mercedes-Benz’s catalytic converter and spark plugs. To depict the proper combination of fuel and air that enters your engine’s cylinders, the car’s onboard computer receives data from the O2 sensor. An automobile may fail an emissions test if it has a dangerous O2 sensor.
  • Your Mercedes-Benz needs new plug wires or spark plugs. The component of your engine that ignites the combination of fuel and air within the combustion chamber in the vehicle is the spark plug. The engine runs because of this explosion, which also drives the pistons. The spark on the ignition coil is sent to the spark plugs through the spark plug wires. Your car will run poorly and have less power if the spark plug wires or spark plugs are damaged or old. Your engine may struggle to start or run in some severe situations. Ignition coil and O2 sensor damage, as well as blocked catalytic converters, can result from worn-out spark plugs and even plug wires and require significant and costly repairs. 
  • You need to replace your mass airflow sensor (MAF). Your Mercedes-Benz’s mass airflow sensor measures the volume of air entering the engine to calculate how much fuel is needed to power your engine efficiently. The mass airflow sensor is a component of the engine management system that helps adapt to significant changes, such as altitude. A dangerous mass airflow sensor may cause problems with your Mercedes-Benz’s starting, rough idling, or abrupt throttle pedal position changes.
  • There is harm or impending danger to your catalytic converter. A component of the exhaust system on your Mercedes-Benz is the catalytic converter. The function of the catalytic converter is to convert carbon monoxide produced during combustion into carbon dioxide. Since improper maintenance is typically the cause of a damaged catalytic converter, All European Auto Repair provides a free multi-point check for every Mercedes-Benz service. If a catalytic converter malfunctions and you choose not to get it serviced, the Mercedes-Benz may fail an emissions test, exhibit poor engine performance, and suffer from reduced fuel efficiency. Additionally, your car might operate at a higher temperature, which increases the risk of overheating-related issues.
  • The most common cause is that the gas cap on your Mercedes-Benz is missing, damaged, or loose. The purpose of your Mercedes-Benz gas cap is dual. It seals the fuel system, keeps the pressure in the fuel tank constant, and prevents gas fumes from exiting while you’re not driving. What occurs if your gasoline cap is dangerous? Fuel loss by evaporation can occur from an outdated or damaged gas cap, necessitating more frequent trips to the gas pump. Fortunately, changing a gas cap doesn’t cost anything. Make sure the fuel cap is securely fastened to the car, either on the vehicle’s roof or at the fuel pump, if your Mercedes-Benz check engine light appears soon after you fill-up the tank.
  • Problems with aftermarket items. If an aftermarket alarm, exhaust, or replacement part was installed incorrectly, it could seriously damage your Mercedes-Benz. These replacement components and add-ons can drain the battery, illuminate the check engine light, or stop the car from starting. If these problems seem well-established, bring your vehicle to All European Auto Repair so that our skilled technicians can ensure your aftermarket parts are installed correctly and not create any problems. Purchasing parts, mainly aftermarket accessories and parts, or starting with OEM parts may be slightly more expensive. Still, you may avoid paying for poor performance and damage from poor installation repair.
  • There’s a vacuum leak in your Mercedes-Benz. A multifunctional vacuum system is a feature of every Mercedes-Benz. The vacuum system directs fumes produced when fuel evaporates through the engine, reducing dangerous emissions. A vacuum leak may be the reason for any high idle or sporadic surges in your RPM. Vacuum hoses may dry up and crack with time, particularly if exposed to intense heat or cold.
Mercedes Benz Check Engine Light Codes

Mercedes-Benz Check Engine Light Codes

Although seeing the small light on your car’s dashboard suddenly light up can be frightening, you shouldn’t immediately get terrified of the check engine light flashing. Check engine light codes are also known as diagnostic trouble codes or DTCs. The ECM, also known as the OBD (onboard computer diagnostic system) within your vehicle, stores these car computer codes. There are hundreds of different codes that can be associated with your check engine light. Even if it sounds complicated, if you have patience, you can learn a lot about your car and let the Check Engine Light serve as your guide, as it is designed to do. Regretfully, a lit Check Engine Light does not always correspond with clear and helpful car symptoms. Hundreds of functional causes for light exist since it has plenty of functional OBD codes, such as:

  • Air and fuel metering systems issue
  • Transmission issues
  • Ignition system faults
  • Bad Spark Plugs
  • Computer output circuit issues
  • Emissions control issues
  • Missing Gas Cap or Loose Gas Cap
  • O2 Sensor
  • Old Battery

For someone who is not very knowledgeable about cars, it is essential to remember not to presume what a code indicates. If an unhealthy concern causes the engine light to illuminate, you risk further damaging your vehicle if you put off fixing it. When the check engine light appears, you should have a qualified Mercedes-Benz service center to look it over. For the best check engine light service, make an online appointment or call All European Auto Repair at (702) 363-9191.


How much will it cost to have the engine light checked?

Getting the informative code reading and a diagnosis is remarkable since the check engine light informs you of problems, from an improperly tightened gas cap to a more severe malfunction like a malfunctioning catalytic converter or an issue with one of your car’s oxygen sensors. 

The approximate cost for diagnosing and testing the check engine light ranges from $88 to $111. The good news is that All European Auto Repair provides free multi-point inspections and, for the most part, free diagnostics to help identify the reason behind the check engine light.

What are some service tips if your Mercedes check engine lights are on?

If the check engine light in your Mercedes is illuminated, it’s essential to address the issue promptly to ensure your vehicle’s optimal performance and safety. Here are some service tips to follow:

  • Don’t Ignore It: The check engine light indicates something is amiss with your vehicle. Ignoring it can lead to more significant and costly problems down the road. As soon as you notice it, take it seriously.
  • Check for Immediate Issues: If the check engine light is flashing rather than steadily illuminated, it signifies a severe problem that requires immediate attention. In such cases, reduce your speed, avoid heavy acceleration, and seek professional assistance immediately.
  • Tighten the Gas Cap: An improperly sealed or loose gas cap may sometimes trigger the check engine light. Before seeking professional help, make sure your gas cap is securely fastened.
  • Check Other Warning Lights: Pay attention to other warning lights on your dashboard. They may provide additional information about the problem, such as low oil pressure or overheating. It can help you pinpoint the issue.
  • Schedule a Service Appointment: Contact your nearest authorized Mercedes-Benz service center or a reputable auto repair shop to schedule a diagnostic check. Explain the situation and any symptoms you’ve noticed, such as unusual noises, poor performance, or changes in fuel efficiency.

Remember that the check engine light serves as a warning system, and addressing the underlying issue promptly can prevent further damage and save you money in the long run. Always seek professional help if you’re unsure about the cause of the check engine light in your Mercedes.

Mercedes Check Engine Light Service in Las Vegas

What to Do If the Check Engine Light Is On in Your Mercedes-Benz

When your Mercedes-Benz’s check engine light illuminates, we always advise visiting our service center so that one of our skilled technicians can accurately diagnose and repair your car. Our service professionals can rapidly decode Mercedes-Benz OBD codes with the newest diagnostic tools.

However, how a check engine light acts can assist you in identifying the possible problem and its severity in your Mercedes-Benz. To help you with understanding what to do next, the following scenarios are possible:

  • The check engine light usually illuminates in certain conditions. If your car’s check engine light becomes intermittent, pay attention to any changes in how it works during this time. Try driving your car as little as possible until you can get it serviced if you notice a change. You face the risk of your car not starting again since, most likely, something is about to break.
  • Constant check engine lights. The onboard diagnostic system in the vehicle has identified a problem that needs to be fixed. Even if your car seems to be working well, getting it serviced immediately is advisable to avoid causing more problems.
  • There’s an obvious performance issue, and the check engine light gets on. If your car performs more poorly than usual and the check engine light is on, your car may have gone into “limp mode” automatically to stop further damage. To avoid causing any harm to the engine in this situation, you should have the car towed or go directly to our service center.
  • Blinking check engine light while driving. It should not be mistaken with the light flickering once in a while. If the check engine light blinks constantly, the vehicle probably has a serious problem, so you must pull over as soon as it is safe. For your safety, we advise hauling your car here if you are far from our servicing location.

Please use our online form to arrange an appointment or give us a call at (702) 363-9191 to talk with one of our specialists if you have any more questions about check engine lights.


Is it safe to operate your Mercedes-Benz when the check engine light is on? 

You are advised to service your Mercedes-Benz immediately if the check engine light illuminates, as this indicates a possible serious issue. This question could be more complex since everything relies on the problem’s seriousness. Driving should be safe if the problem is small, like a loose gas cap. The check engine light will often glow steadily to indicate this. Should you observe a change in the car’s function, it might be a sign of a more dangerous issue. Dial (702) 363-9191 to speak with an All European Auto Repair expert and explain the problems. Or slow down and bring the Mercedes-Benz to our qualified mechanics as quickly as possible.


Schedule Your Check Engine Light Service Today

Experience the All European Auto Repair difference when it comes to check engine light services in Las Vegas. Your Mercedes deserves the utmost care and attention, and that’s what we provide. No matter the issue, our team is here to diagnose and fix it promptly. Schedule your check engine light service today and discover the quality and expertise that sets our name apart in the industry. 

Call us at (702) 363-9191 for questions and information.