Frequently Asked Questions

Why is a battery important for a 2018 Mercedes-Benz S-Class?

• It powers critical systems: ignition, electronics, adaptive suspension, and safety features that the 2018 Mercedes-Benz S-Class relies on every time you drive.
• Weak batteries cause unpredictable behavior in advanced vehicle electronics; replacing a failing battery prevents false warnings and preserves performance.
• Plaza Motor Company in MO offers certified diagnostics and OEM-quality replacements that often cost less than independent shops while delivering factory-trained expertise and long-term savings.
• All warranty-covered battery repairs must be performed at a certified dealership to keep coverage valid and ensure proper calibration and documentation.
• We offer service financing so you can get the battery service now and pay later, and you can always schedule service online for a convenient appointment.

How long does a battery replacement take?

• Most battery replacements on a 2018 Mercedes-Benz S-Class are completed within an hour to an hour and a half, depending on diagnostics and vehicle programming needs.
• Our technicians perform a full electrical system test and safe battery registration to ensure accessories and safety systems remain calibrated after replacement.
• Plaza Motor Company uses OEM or manufacturer-equivalent batteries and factory procedures to reduce callbacks and extend battery life—this translates to immediate and long-term savings.
• Schedule your appointment quickly through our online scheduler—click to schedule service—or check current offers under our service specials.

How much does a battery cost for a 2018 Mercedes-Benz S-Class?

• Costs vary by battery type and whether OEM parts are used; at Plaza Motor Company in MO we provide transparent estimates and often cost less than independent shops while offering factory-trained technicians.
• Price includes installation, system testing, and registration when required—these steps protect vehicle electronics and save you money over time by preventing follow-up issues.
• We highlight available discounts and recommend checking our service specials before booking to maximize savings.
• Service financing is available to help you get the work done now and pay over time; for a fast booking, schedule service online.

How often should you replace the battery?

• Typical life for batteries in modern vehicles is 3–5 years, but usage, climate, and electronics load on the 2018 Mercedes-Benz S-Class can shorten that span.
• Regular checks during oil changes or inspections at Plaza Motor Company help catch weak batteries early and avoid inconvenient failures.
• We recommend annual electrical system checks for vehicles older than three years and immediate testing if you notice slow starts, dimming lights, or warning messages.
• Remember: warranty repairs must be performed at a certified dealership to preserve coverage—our team will document any work and offer guidance on replacement timing.

What type of battery is in the 2018 Mercedes-Benz S-Class?

• The 2018 Mercedes-Benz S-Class typically uses advanced lead-acid variants such as AGM or enhanced flooded batteries to handle high electrical loads.
• Plaza Motor Company installs compatible OEM-equivalent batteries and performs required vehicle registration and testing to ensure systems function correctly.
• We’ll explain battery chemistry options, pros and cons, and how each impacts longevity and performance so you make an informed choice that saves money over time.
• Check current offers through our service specials and schedule service online to discuss the best battery option for your S-Class.

What size battery is in the 2018 Mercedes-Benz S-Class?

• Battery group sizes and capacity can vary by engine and options; the 2018 Mercedes-Benz S-Class typically requires a high-capacity battery suited to its electrical demands.
• Plaza Motor Company technicians verify the correct group size and cold-cranking amps (CCA) before installation to maintain reliability and warranty compliance.
• Choosing the right size upfront avoids premature failure and reduces total ownership costs—our certified team will recommend the proper fit for your vehicle.
• To learn the exact specification and to book a service time, schedule service or review our latest service specials.