2019 Mercedes-Benz Metris Battery Size & Group

Quick Answer

• BCI Group Size: H6 (also known as Group 48)
• CCA Rating: 720 CCA minimum
• Reserve Capacity: 120-140 minutes
• AGM vs. Flooded: AGM (Absorbent Glass Mat) is required for optimal performance and to meet vehicle demands.
• Terminal Layout: Typically standard SAE post terminals, top mounted.
• Physical Dimensions (H6/48): Approximately 10.9" L x 6.9" W x 7.6" H
• Dual-Battery Setup: Not applicable for the 2019 Mercedes-Benz Metris (single battery system).

Replacement Battery Options

When it's time to replace the battery in your 2019 Mercedes-Benz Metris, choosing the correct AGM battery is crucial. Here are some popular options:

• Interstate: MT7-48/H6 (AGM)
• Optima: Optima YellowTop H6 (AGM, though Optima often uses their own numbering system, an H6 equivalent is what you'd look for)
• DieHard: Platinum AGM H6 (AGM)
• Odyssey: ODP-AGM48 H6 (AGM)
• ACDelco: ACDelco Gold 48AGM (AGM)

Always verify the specific part number with your supplier as numbers can change.

AGM vs. Flooded — Which Does This Vehicle Need?

The 2019 Mercedes-Benz Metris, like many modern European vehicles, is designed for and requires an AGM battery. The electrical systems in these vehicles are complex, featuring start-stop technology, numerous electronic control units (ECUs), and sensitive power demands. AGM batteries are far better suited to handle these demands than traditional flooded lead-acid batteries for several reasons:

1. Deep Cycling Capability: AGM batteries can withstand deeper discharge cycles without significant damage, which is essential for vehicles with start-stop systems that frequently shut off and restart the engine.
2. Higher Power Output: They deliver consistent power, crucial for powering the many electronics in the Metris.
3. Vibration Resistance: The glass mat construction makes them more resistant to vibration, common in commercial vehicles like the Metris.
4. Sealed, Maintenance-Free Design: No fluid checks or top-offs are required, and there's no risk of acid spills.
5. Longer Lifespan: While often more expensive upfront, AGM batteries generally last longer than flooded batteries in modern vehicles.

Using a flooded battery in a vehicle designed for an AGM can lead to premature battery failure, electrical system malfunctions, and potentially reduced performance of various vehicle features, including the start-stop system.

Post-Installation Relearn / Reset Procedure

After replacing the battery in your 2019 Mercedes-Benz Metris, it's important to be aware of a potential relearn or reset procedure. Modern Mercedes-Benz vehicles utilize a sophisticated Battery Management System (BMS) that monitors the battery's state of charge, health, and age. Simply disconnecting and reconnecting a new battery may not be enough for the BMS to recognize the new battery's full capabilities and optimize charging.

While some basic functions may return immediately, for a complete reset and optimal performance, it is highly recommended to perform a battery registration or adaption process using a Mercedes-Benz compatible diagnostic tool. This procedure informs the vehicle's ECU that a new battery has been installed, allowing the system to reset charging parameters and ensure the new battery is optimized for longevity and performance. Failure to do so can lead to the alternator over or undercharging the new battery, shortening its lifespan. Some common items that might need to "relearn" include window auto-up/down, steering angle sensor, and radio presets.

Signs of a Failing Battery

Watch out for these common indicators that your Metris battery might be on its way out:

• Slow Engine Crank: The engine turns over sluggishly when starting.
• Dim Headlights/Interior Lights: Especially noticeable when the engine is off or just cranking.
• Warning Lights on Dashboard: Battery warning light, check engine light, or other electrical system warnings.
• Electronic Malfunctions: Issues with infotainment, power windows, or other electrical accessories.
• Frequent Start-Stop System Deactivation: The start-stop system stops working or activates inconsistently.
• Corrosion on Terminals: White or blue powdery substance around battery posts.
• Swollen or Bulging Battery Case: A clear sign of internal damage and impending failure.

Common Battery Issues for This Generation

For the 2019 Mercedes-Benz Metris, common battery issues often revolve around the demands of its advanced electrical system. Factors contributing to premature battery failure can include:

• Frequent Short Trips: Does not allow the battery to fully recharge.
• Heavy Electrical Load: Running many accessories (HVAC, navigation, charging devices) without the engine running.
• Extreme Temperatures: Both very hot and very cold weather can stress batteries.
• Ignored Battery Registration: Not performing a battery registration after replacement can lead to improper charging.
• Parasitic Draws: Minor electrical draws present even when the vehicle is off, slowly draining the battery over time.

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