2013 Mercedes-Benz SLK350 Has A Check Engine Light

Check Engine Light Issues in 2013 Mercedes-Benz SLK350: Causes and Solutions

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Reviewed by
Devin Cabugcal
Written by RepairPal Car Genius
Updated January 14, 2025
0%
40% chance it's the
Emissions System
0%
60% chance it's
Something else
The most common reasons a 2013 Mercedes-Benz SLK350 has a check engine light are an emissions system component, a sensor, or a catalytic converter.
  • Emissions System: A faulty emissions system component, such as an oxygen sensor or EGR valve, can lead to increased emissions and trigger the check engine light.
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 2013 Mercedes-Benz SLK350 has a check engine light?

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 faulty oxygen sensor is one of the most common causes of a check engine light. Symptoms may include a decrease in fuel mileage, hesitation or misfiring from the engine, rough idling or even stalling. A faulty sensor may cause the vehicle to fail an emissions test.

Any time there is an emissions fault the check engine light will be displayed. The purpose of the check engine light is to inform the driver that an emission related fault has been found, and that there are on-board diagnostic (OBD) trouble codes stored in the powertrain or engine control module. Additionally, since the emissions systems are so intertwined into engine control and transmission control systems, symptoms may include nearly any sort of drivability concerns. This may include harsh shifting, failure to shift, hesitation on acceleration, jerking, engine failure to start or run, loss of power, or any number of other drivability issues.

Due to the nature of electrical systems on modern vehicles, the range of problems these can cause are nearly limitless. However, there is a way to categorize them in two ways. Permanent and intermittent problems. Permanent problems appear and remain. This may be the vehicle will not start, the radio does not work, or the door chime will not turn off among many, many others. These problems are more straight-forward to diagnose since they present themselves at all time. This means there will always be a fault to find. Intermittent electrical problems, however, can be difficult or impossible to locate, since they appear then disappear without warning. The best case scenario for an intermittent issue is when replicating the problem is easily accomplished and understood. This allows a technician to make an issue semi-permanent, allowing them to find the fault. Other issues that come and go without warning and cannot be replicated on demand must occur when the technician is servicing the vehicle, otherwise there is no problem to correct. It is most important to understand that electrical system faults always require inspection, and can include the vehicle working in any manner, or not working at all.

Like we noted in the last section, general diagnosis symptoms are the most vague of the bunch. There are several diagnostic spectrums, electrical diagnosis, drivability diagnostics, engine diagnostics, transmission diagnostics, and the list could continue for about 5 or 10 more spectrums of diagnostics. The most important take-away here, is that general diagnostics are diagnostics that have no other spectrum in which they fit, or the problem is unknown. This means that any vehicle left outside of a repair facility with the keys and an authorization to perform diagnosis will be diagnosed under the general diagnosis spectrum.

When the Check Engine Light comes on, you may experience engine performance issues such as poor acceleration, rough idling, or an engine that won't start. In some cases, no abnormal symptoms will be experienced. Other systems like the transmission or ABS can cause the Check Engine Light to illuminate and lights for those systems can come on at the same time. Similar lights may say "Check Engine Soon", "Malfunction Indicator Light" or just "Check". In rare case the engine can overheat.

What are the initial diagnostic steps to take for a check engine light on a 2013 Mercedes-Benz SLK350?

When faced with a check engine light on your 2013 Mercedes-Benz SLK350, it's essential to approach the diagnosis methodically. Start by checking the gas cap; a loose or damaged cap is a common culprit that can easily trigger the light. Next, take a moment to inspect your dashboard for any additional warning lights or messages that might offer further insight into the issue. Utilizing an OBD-II scanner is a crucial step, as it allows you to access error codes from the vehicle's computer, helping to identify the specific problem. Additionally, examining the condition of your spark plugs is important, as worn or faulty plugs can also cause the light to illuminate. Don’t forget to check the levels of essential fluids like oil and coolant, as low levels can sometimes lead to the check engine light being activated. If these initial steps do not resolve the issue, it may be time to consult a professional mechanic for a more thorough diagnosis. By following this structured approach, you can effectively troubleshoot the check engine light and potentially save on repair costs.

What are the common problems that could cause the check engine light to illuminate in a 2013 Mercedes-Benz SLK350?

When the check engine light comes on in a 2013 Mercedes-Benz SLK350, it can be a source of concern for any car owner. Understanding the common problems that may trigger this warning can empower you to take the right steps toward resolution. One frequent culprit is a loose gas cap, which can easily be checked and tightened. Another common issue is a faulty oxygen sensor, which affects the air-fuel mixture and can lead to decreased fuel efficiency. Additionally, problems with the catalytic converter, such as blockages or failures, can also illuminate the check engine light, indicating a need for further inspection. A malfunctioning mass airflow sensor can disrupt engine performance, while worn-out spark plugs or faulty ignition coils may cause misfires, both of which are critical to address. Lastly, vacuum leaks can significantly impact the engine's air-fuel ratio, leading to performance issues. By being aware of these potential problems, you can take proactive measures to diagnose and resolve the issue, ensuring your SLK350 runs smoothly and efficiently.

How urgent is it to address the check engine light in a 2013 Mercedes-Benz SLK350?

When the check engine light illuminates in your 2013 Mercedes-Benz SLK350, it is essential to recognize the urgency of the situation. This warning light is not merely a nuisance; it signals that there may be underlying issues with your engine or emissions system that require immediate attention. Ignoring this alert can lead to a cascade of problems, including reduced fuel efficiency, compromised vehicle performance, and even severe engine damage, which could result in costly repairs. For those inclined to take a DIY approach, it is crucial to utilize the onboard diagnostics system to identify the specific error codes that triggered the light. This proactive step can help you understand the severity of the issue and determine whether it is something you can address yourself or if professional assistance is necessary. Ultimately, addressing the check engine light promptly not only safeguards your vehicle's health but also enhances your driving experience, making it a vital task for any responsible car owner.

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2013 Mercedes-Benz SLK350 Check Engine Light Guide