Frequently Asked Questions

What is the first thing to check when the check engine light comes on?

• Confirm vehicle status: note whether the light is steady or flashing and any changes in performance or range.
• Check the charging connection and recent charging events—charging faults can trigger warning lights on an electric EQS.
• Inspect obvious items like 12V battery condition and high-voltage system alerts shown in the instrument cluster.
• If in doubt, reduce speed and avoid heavy loads. Book immediate diagnostic service with us to prevent escalation.
• Remember: warranty-covered repairs must be completed at a certified dealership to maintain coverage.

How long does a check engine light service take?

• Initial diagnostic typically takes 30–90 minutes, depending on code complexity and vehicle state-of-charge.
• If additional testing, software updates, or component verification is needed, total time can extend to a few hours or more.
• We prioritize accurate diagnostics over quick resets to avoid repeated visits and higher long-term costs.
• Our trained Mercedes-Benz technicians often complete repairs faster and with fewer return visits than independent shops, delivering immediate and long-term savings.
• Use our service scheduler to reserve time and get a clear turnaround estimate.

What does it mean when the check engine light comes on in a 2025 Mercedes-Benz EQS?

• The warning may indicate issues with the high-voltage battery management, inverter, charger communication, thermal systems, or auxiliary electronics.
• A steady light often signals a non-critical fault; a flashing light can indicate a severe condition that requires immediate attention.
• Ignoring warnings can reduce electric range, impair charging, or cause component damage—raising repair costs over time.
• Bringing the vehicle to our dealership ensures OEM diagnostics, genuine parts, and warranty protection for any covered repairs.
• We commonly identify root causes faster than independent shops, which can lower your total cost of ownership.

How much does a check engine light diagnostic cost for a 2025 Mercedes-Benz EQS?

• Diagnostic fees typically start around $129, but final cost depends on time and necessary module testing.
• Many issues are identified quickly, and our dealership often costs less than independent shops when you factor in accurate diagnosis, genuine parts, and fewer repeat repairs.
• If warranty applies, covered diagnostics and repairs must be completed at a certified Mercedes-Benz dealer to preserve coverage.
• We provide transparent estimates before work begins so you can weigh immediate repair versus potential long-term expenses.
• Ask about service specials or schedule online to view current offers and appointment availability.

What is the most common reason for check engine light on a 2025 Mercedes-Benz EQS?

• Common triggers include battery management system (BMS) faults, charging port communication errors, inverter or motor controller issues, and thermal management alerts.
• Software and sensor communication errors can also illuminate the warning and are often resolved with targeted diagnostics or updates.
• Prompt dealer service can prevent range loss and expensive component damage later, saving you money over time.
• Our factory-trained technicians use Mercedes-Benz tools to validate codes, apply software calibrations, and replace genuine parts when needed.
• Warranty-covered work must be performed at a certified dealership to remain valid.