The GLK 350 generally runs on a 12-volt automotive battery. In most standard configurations, that means a conventional lead‑acid unit; models equipped with Mercedes-Benz’s Start-Stop system may use an AGM (Absorbent Glass Mat) battery to handle higher electrical demand.
This article outlines the main battery types you’re likely to encounter in the GLK 350, what to know when replacing it, and practical maintenance tips. It also notes that variations can occur by model year and market, so always verify with the owner's manual or a Mercedes-Benz‑approved battery supplier.
Battery configurations by model year and equipment
Below are the common configurations you might find for the GLK 350, depending on year and market. The aim is to help you identify which battery type your vehicle likely uses and why it matters for replacement and maintenance.
- Conventional 12-volt lead-acid battery is standard on GLK 350 models without the Start-Stop feature.
- Absorbent Glass Mat (AGM) 12-volt battery is used on GLK 350s equipped with Start-Stop or when Mercedes-Benz specifies AGM for higher electrical loads.
- Battery capacity and cold-cranking amps (CCA) vary by year and market; replacements should match the vehicle’s Mercedes-Benz specifications.
- Mercedes-Benz-approved batteries or those meeting MB’s group size and electrical requirements are recommended to ensure compatibility with the vehicle’s battery management system.
Understanding these configurations helps you pick the right battery and avoid compatibility issues that can affect start-up performance and electronics.
Practical considerations for replacement and maintenance
Before replacing the battery, consider the vehicle’s electrical system requirements and whether reprogramming or battery registration is needed after installation. This is particularly important for Start-Stop models, where the battery communicates with the car’s onboard computer.
- When replacing, check whether your GLK 350 requires battery coding or learning procedures after installation. Some configurations note the new battery to the car’s battery management system to restore optimal performance.
- Use a proper charging profile for automotive batteries (typically up to about 14.5 V when charging) and avoid prolonged overcharging. A smart charger can help manage this automatically.
- Inspect battery terminals for corrosion, clean posts with an appropriate solution, and apply anti-corrosion treatment. Ensure connections are tight and free of post‑strain damage.
- Dispose of the old battery at a licensed recycler or a Mercedes-Benz service center that accepts spent batteries. Many suppliers offer take-back programs as part of standard service.
Following these steps helps ensure reliable startup and protects the electrical systems that depend on the 12-volt battery.
Maintenance tips and what to watch for
Regular checks can extend battery life and prevent unexpected failures. Look for signs such as slower engine cranking, dimming lights, or warning lights on the dashboard. In hot climates, battery life tends to shorten, so proactive testing every 2–3 years is common practice for vehicles like the GLK 350. If you’re unsure, have a Mercedes-Benz technician perform a battery health test and, if needed, a battery replacement with proper programming.
Summary
The GLK 350 uses a 12-volt automotive battery, typically a conventional lead-acid unit, with AGM batteries reserved for Start-Stop-equipped versions or higher electrical-load configurations. Replacement should align with Mercedes-Benz specifications, and Start-Stop models may require coding or a learning procedure after installation. Regular maintenance and professional checks help ensure reliability and longevity of the battery and the vehicle’s electrical system.
What battery does a GLK 350 take?
DieHard Platinum AGM – Battery : H7 Group Size, 850 CCA, 1000 CA, 140 Minute Reserve Capacity (Part No. H7-AGM)
What type of battery does Mercedes-Benz use?
Mercedes-EQ vehicles still use a 12-volt battery for vehicle systems.
What size battery is in the 2014 glk350?
Super Start Platinum AGM Top Post Battery Group Size 48 H6 760 CCA 120 Minute RC - 48PLT. Weight (Lbs): 47.5 Lbs.
Where is the battery for a GLK 350?
Here you'll find the battery. Cover. To release this battery cover you have three latches you have one here. Give it a good good Good tug push or push push to the side. All right it's kind of tight.