Frequently Asked Questions

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

• Check the gas cap for a loose or damaged seal — it’s a common, simple cause and can clear the light after a few driving cycles.
• Confirm basic fluids and visible leaks; low oil or coolant can trigger warnings and should be addressed immediately.
• If the light persists, avoid clearing codes yourself — an unresolved fault may cause further damage.
• Bring the 2025 Mercedes-Benz GLC-Class to our service center so factory diagnostics can verify issues and protect warranty coverage.

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

• Diagnostics typically range by complexity; our flat-scan fee covers advanced OEM scanning and a complete inspection to identify root causes.
• Mercedes-Benz of Sudbury often costs less than independent shops while offering factory-trained technicians and genuine parts — delivering immediate and long-term savings.
• If repairs are covered under warranty, they must be completed at a certified dealership to retain coverage and ensure proper repair documentation.
• We provide transparent estimates before any work so you can weigh repair options based on value and warranty protection.

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

• The light indicates the vehicle’s onboard diagnostics detected a fault — from minor sensor issues to conditions that affect emissions or drivability.
• Common triggers include oxygen sensors, EVAP leaks, misfires, or catalytic system performance; each has different urgency and repair paths.
• Our technicians read stored trouble codes and perform guided inspections to pinpoint the cause and recommend corrective action.
• Timely diagnosis at a certified dealership prevents escalation, preserves warranty eligibility, and minimizes long-term repair costs.

How long does a check engine light service take?

• Initial code reading and inspection usually take 30–60 minutes; many simple issues can be diagnosed during a single visit.
• Repair time varies: minor fixes (gas cap, sensor swap) can be completed the same day, while complicated repairs require parts ordering and additional time.
• Mercedes-Benz of Sudbury offers efficient scheduling through our Service Scheduler and can often complete work faster than independent shops due to OEM parts access and specialized tools.
• We focus on fast, accurate repairs that deliver immediate savings and protect long-term value and warranty coverage.

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

• Loose or faulty gas cap leading to an EVAP system fault is one of the most frequent and simplest causes.
• Oxygen sensor failures and minor fuel/air trim issues also commonly trigger codes and affect fuel economy.
• Misfires or ignition faults are less common but more serious — they can damage the catalytic converter if left unaddressed.
• Bring your vehicle to Mercedes-Benz of Sudbury for a precise diagnosis; timely dealer service reduces repair costs and protects warranty coverage.