Frequently Asked Questions

What does it mean when the check engine light comes on in a 2024 Mercedes-Benz S-Class?

• It signals that the vehicle's onboard diagnostics detected a fault — anything from a loose gas cap to an emissions or engine management issue. Our certified technicians at Mercedes‑Benz of Sudbury will run a full scan to identify the exact trouble code and explain the implications in plain language.
• We prioritize transparency: you’ll receive an itemized estimate and a clear explanation of immediate and long-term effects if the issue is left unaddressed, plus recommended OEM parts and services to preserve vehicle value and performance.
• Repairs covered under warranty must be performed at a certified dealership to maintain coverage — our factory-trained technicians and dealership warranty processes protect your investment.
• To get a fast, accurate diagnosis and avoid further damage, schedule service online or review our current service specials to save on repairs.

How long does a check engine light service take?

• Typical diagnostics for a check engine light take 30–90 minutes depending on the complexity of codes. Simple fixes like a sensor replacement or software update can often be completed the same day.
• Our Sudbury facility is equipped with advanced Mercedes-Benz diagnostic tools and OE-level parts, allowing faster turnaround without sacrificing quality.
• We offer service financing so you can get service now and pay later, and our service advisors will outline estimated time and cost before any work begins.
• To minimize downtime, you can schedule appointment online and check available service specials.

How much does a check engine light diagnostic cost for a 2024 Mercedes-Benz S-Class?

• Diagnostics at Mercedes‑Benz of Sudbury start from approximately $94 for a standard scan and initial code analysis. We often cost less than independent shops while providing factory-level tools, certified technicians, and genuine OEM parts.
• Choosing our dealership delivers immediate savings through accurate diagnostics — avoiding unnecessary parts replacement — and long-term savings by preserving warranty coverage and preventing larger failures.
• If repairs are required, we provide transparent estimates and explain available warranty coverage and the savings of using OE parts performed by factory-trained techs.
• Book a diagnosis now through our easy online scheduler: schedule service. Also check our service specials for current offers and available discounts.

What is the most common reason for the check engine light on a 2024 Mercedes-Benz S-Class?

• Common causes include an oxygen sensor issue, catalytic converter concerns, ignition coil or spark plug faults, and occasionally a loose or damaged fuel cap affecting emissions monitoring.
• Even minor issues can reduce fuel economy and long-term engine health; our technicians explain each code’s likely consequences and repair costs so you can make informed choices.
• We emphasize preventive care at Mercedes‑Benz of Sudbury — prompt diagnostics protect performance and resale value, and warranty repairs must be performed at certified dealerships to remain valid.
• To keep your S‑Class running at its best, schedule service today and review available service specials for savings.

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

• Start with the basics: ensure the gas cap is tight and the fuel filler area is sealed. A loose cap is a frequent cause and can trigger an emissions-related code.
• If the light remains on, bring the 2024 Mercedes-Benz S-Class to Mercedes‑Benz of Sudbury for a professional scan. Our factory-grade tools identify the exact code and prevent guessing that can lead to unnecessary expense.
• We offer clear, benefit-focused recommendations, service financing, and usually lower overall costs than independent shops thanks to accurate diagnostics and OEM parts that last longer.
• Use our online booking to schedule appointment and check current service specials before your visit.