2023 Mercedes-Benz EQS 450+ Has A Check Engine Light

Resolve Check Engine Light Issues in 2023 Mercedes-Benz EQS 450+

Find Repair Location
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 2023 Mercedes-Benz EQS 450+ 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 2023 Mercedes-Benz EQS 450+ 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.

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 2023 Mercedes-Benz EQS 450+?

When faced with a check engine light on your 2023 Mercedes-Benz EQS 450+, it's essential to adopt a methodical diagnostic approach. Start by examining the dashboard for any additional warning lights, as these can offer crucial insights into the underlying issue. Next, inspect the gas cap; a loose or improperly sealed cap is a common culprit that can easily trigger the check engine light. Additionally, conduct a visual inspection of the vehicle for any apparent damage, such as leaks or loose wiring, which may indicate a more significant problem. If these initial checks do not resolve the issue, utilizing a diagnostic scanner can be invaluable. This tool allows you to access the error codes stored in the vehicle's computer, providing specific information about what might be malfunctioning. Finally, don't overlook the owner's manual, which can offer tailored guidance on the check engine light's meaning and recommended actions for your specific model. By following these steps, you can effectively narrow down the potential causes of the check engine light and take informed action towards resolving the issue.

What are the common problems that could cause the check engine light to illuminate in a 2023 Mercedes-Benz EQS 450+?

When the check engine light comes on in a 2023 Mercedes-Benz EQS 450+, it can be concerning, but understanding the common problems can help you troubleshoot effectively. One of the simplest issues to check is the gas cap; a loose or damaged cap can easily trigger the light, so ensure it is securely fastened. Another frequent culprit is a faulty oxygen sensor, which can affect fuel efficiency and emissions, making it worthwhile to inspect this component. Additionally, problems with the catalytic converter can lead to inefficiencies that activate the check engine light, so keep an eye out for any unusual exhaust smells or performance issues. Spark plugs and ignition coils are also critical; if they are worn or malfunctioning, they can cause engine misfires, which will illuminate the light. Lastly, a malfunctioning mass airflow sensor can disrupt the air-fuel mixture, leading to performance issues and triggering the warning. By checking these common problems, you can potentially identify the cause of the check engine light and take appropriate action before consulting a mechanic.

How urgent is it to address the check engine light on a 2023 Mercedes-Benz EQS 450+?

When the check engine light illuminates on your 2023 Mercedes-Benz EQS 450+, it signals a potential issue that requires immediate attention. This warning light is not just a minor inconvenience; it indicates that there may be underlying problems with the engine or emissions system that could compromise your vehicle's performance and efficiency. For DIY enthusiasts, it’s crucial to understand that neglecting this warning can lead to more severe and costly repairs, such as engine misfires or catalytic converter failures. Continuing to drive with the check engine light on can exacerbate these issues, potentially resulting in significant damage and safety hazards. Therefore, it is advisable to conduct a thorough diagnostic check as soon as possible. By addressing the check engine light promptly, you can identify the specific problem and take the necessary steps to resolve it, ensuring your vehicle remains reliable and safe on the road.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.