Frequently Asked Questions

What does it mean when the check engine light comes on in a 2026 Mercedes-Benz SL?

• It signals the vehicle’s onboard diagnostics detected an issue — anything from an emissions sensor to a charging or battery system fault. For the 2026 Mercedes-Benz SL, hybrid systems and performance electronics are monitored closely.
• At Mercedes-Benz of Chesterfield our certified technicians use OEM diagnostic tools to identify the precise fault and explain repair options, including battery inspection or replacement when relevant.
• Prompt diagnostics often prevent costly downstream failures; our pricing is competitive with independent shops and can save you money over time through accurate repairs and OEM warranties.
• If a repair is covered under warranty, it must be performed at a certified dealership to preserve coverage — we’ll help you verify warranty status and handle claims.
• To get started, you can schedule service online and ask about available service specials and financing options.

How long does a check engine light service take?

• Most diagnostics are completed within 60–90 minutes; complex repairs or battery tests may extend total time. We provide transparent time estimates before work begins.
• Mercedes-Benz of Chesterfield offers fast lanes and comfortable amenities so visits are efficient and convenient; our factory-trained techs quickly move from diagnosis to repair with OEM parts on hand.
• We also offer service financing so you can get service now and pay later, minimizing downtime and protecting long-term vehicle value.
• To reserve a preferred time, please schedule appointment online and review current service specials.

How much does a check engine light diagnostic cost for a 2026 Mercedes-Benz SL?

• Diagnostics vary by issue, but our dealership often costs less than independent shops while delivering factory-level expertise and OEM parts that reduce long-term expenses.
• We emphasize immediate and long-term savings: correct diagnosis prevents repeat visits, extends component life, and protects warranty coverage.
• If additional repairs or battery replacement are needed, we’ll present clear estimates and warranty options. Covered repairs must be done at a certified dealership to remain valid.
• Schedule now to lock in available pricing and inquire about financing — schedule service or view service specials.

What is the most common reason for check engine light on a 2026 Mercedes-Benz SL?

• Common causes include sensor faults (oxygen, MAF), loose fuel caps, battery or charging system irregularities, and in hybrid or e-performance models, battery management alerts.
• At Mercedes-Benz of Chesterfield our diagnostic approach isolates root causes to avoid unnecessary parts replacement and preserve performance and fuel economy.
• Addressing issues early keeps the vehicle within factory tolerances and helps avoid expensive drivetrain or emissions repairs down the road.
• Book a diagnostic online to get a clear estimate and discuss OEM battery replacement if required — schedule appointment.

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

• Start with a safe pull-over and check for urgent symptoms (smoke, loss of power). If the light is steady, it’s often safe to drive to our shop; if flashing, stop immediately and have the vehicle inspected.
• For the 2026 Mercedes-Benz SL, our techs first confirm battery and charging system health, then read codes with OEM tools to prioritize repairs and OEM parts replacements.
• We provide transparent written estimates and highlight immediate versus long-term savings, plus warranty coverage and financing options to make repairs manageable.
• Use our online scheduler to reserve a diagnostic appointment: schedule service, and check current service specials.