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If you are not close to our service center, we suggest having your vehicle towed here just to be safe. The check engine light is blinking while driving: Not to be confused with the light occasionally flickering in the first situation, if your check engine light is blinking consistently that typically indicates there is a major issue with your vehicle and you should pull over when safe.In this case, you should come straight to our service center or have the vehicle towed to prevent any damage to the engine. The check engine light is on and there is a noticeable performance issue: If you are noticing a consistent decrease in performance with the check engine light on, your vehicle may have automatically entered a "limp-mode" to prevent additional damage.Although your vehicle may seem to be operating fine, it's best to bring it in for service as soon as possible to prevent additional issues. The check engine light is constantly on: Your vehicle's onboard diagnostic system has determined something is wrong and needs to be fixed.Most likely something is on the verge of failing and you run this risk of your vehicle not starting again. If you do notice a difference, try driving your vehicle as little as possible until you can bring it in for service.

The check engine light only comes on in certain conditions: If the check engine light is coming on intermittently, be sure to notice any changes in the performance of your vehicle when the light is on.To help you better understand what you should do next, we've outlined possible scenarios: The way your check engine light is behaving though can help you determine what might be wrong with your Mercedes-Benz, and the severity of the issue. Our service technicians have the most up-to-date diagnostic equipment that can quickly read Mercedes-Benz OBD codes. No matter the situation, when the check engine light comes on in your Mercedes-Benz, we always suggest stopping by our service center so one of our knowledgeable technicians can properly diagnose and repair your vehicle. What to Do if Your Mercedes-Benz Check Engine Light Comes On

A faulty MAF sensor can cause your engine to misfire, ultimately causing poor fuel economy, performance, and potentially more unnecessary damage to your engine. Like the oxygen sensors, the MAF sensor measures the amount of air entering the engine and help ensure the proper air-fuel mixture.

Faulty Mass Air Flow Sensor: When exposed to dirty or particle-rich air, the Mass Air Flow (MAF) sensor could fail.

An engine with too little fuel is at risk of total engine failure, and an engine with too much fuel will create excessive smoke and odor. A faulty oxygen sensor can cause your vehicle's computer to supply the engine with too much or too little fuel. The oxygen sensor provides vital air-fuel mixture information to the ECU.

Faulty Oxygen Sensor: Due to long exposure to hot exhaust gas, your oxygen sensor might need replacing.

Faulty spark plugs or spark plug wires can cause your engine to misfire, reducing fuel economy, performance, and even prevent it from running altogether. Your spark plugs create a hot spark that ignites the air-and-fuel mixture in the cylinder, allowing your engine to start and run.

Fouled Spark Plugs or Spark Plug Wires: Over time you will eventually need new spark plugs or spark plug wires.

A failing or clogged catalytic converter can severely impact fuel economy and vehicle performance. The catalytic converter is a vital part of the emissions system, removing toxic carbon monoxide.

Failing Catalytic Converter: Your catalytic converter can eventually clog with material, especially with higher mileage vehicles.

Gas cap issues can reduce fuel pressure and allow fuel vapors to escape, reducing fuel economy and increasing harmful emissions.

Loose Gas Cap: Your gas cap is loose, broken, or simply missing.

Below we have highlighted the most common causes of a check engine light. Fortunately Mercedes-Benz of Houston Greenway is here to help you figure out what might be wrong, and what your next steps should be. A wide array of issues can cause a check engine light to come on, some more serious than others. Has the check engine light turned on in your Mercedes-Benz C-Class, E-Class, GLA, GLC, GLE, ML, or SL? It can be alarming seeing an engine warning appear on your dashboard, especially if you've never seen it before. Common Causes for Mercedes-Benz Check Engine Light