2017 Mercedes-Benz Sprinter Battery Size & Group

Quick answer

• BCI Group Size: H7/94R (Main/Starting Battery), H5/47 or Group 47 (Auxiliary/Leisure Battery, if equipped)
• CCA Rating: 800 CCA (Main Battery)
• Reserve Capacity: 150-170 minutes (Main Battery)
• AGM vs. Flooded: AGM is strongly recommended and often required for the main starting battery due to the vehicle's advanced electrical system and charging profile. The auxiliary battery is also typically AGM.
• Terminal Layout: Typically reversed DIN (terminal posts recessed below the battery surface).
• Physical Dimensions (Main Battery, approximate): 12.4" L x 6.9" W x 7.5" H
• Dual-Battery Setup: Many Sprinters, especially those with diesel engines or upfitter packages, utilize a dual-battery setup: a main starting battery under the hood and an auxiliary/leisure battery (often under the driver's side floorboard or passenger seat) for powering accessories without draining the starting battery.

Replacement battery options

For the main H7/94R starting battery, here are some popular options:

• Interstate: MTX-94R/H7 (AGM) or MTP-94R/H7 (Flooded, if acceptable for your specific vehicle configuration)
• Optima: Optima doesn't typically offer a direct H7/94R fitment in their standard RedTop or YellowTop lines. A custom fitment might be possible but is generally not a direct replacement.
• DieHard: Platinum AGM H7 Group 94R
• Odyssey: ODP-AGM94R H7 (Performance brand within EnerSys)
• ACDelco: 94RAGM (Professional AGM)

For the auxiliary battery (H5/47 or Group 47), common replacements might include smaller AGM batteries from brands like:

• Interstate: MTX-47/H5 (AGM)
• DieHard: Platinum AGM H5 Group 47
• ACDelco: 47AGM (Professional AGM)

(Note: Always verify the exact part number and specifications with your retailer based on your specific VIN, as options can vary by trim and optional equipment.)

AGM vs. flooded — which does this vehicle need?

For the 2017 Mercedes-Benz Sprinter, an AGM (Absorbent Glass Mat) battery is overwhelmingly recommended and, in many cases, required for the main starting battery. Sprinters are equipped with sophisticated electrical systems, including start/stop technology (even if not always active on all models), advanced charging algorithms, and numerous electronic control units (ECUs). These systems are designed to work optimally with the consistent voltage output and deep-cycling capabilities that AGM batteries provide.

Using a traditional flooded lead-acid battery where an AGM is specified can lead to:

• Reduced battery life: The vehicle's charging system may not adequately charge a flooded battery, leading to premature failure.
• Electrical system malfunctions: Inconsistent voltage from an incompatible battery can cause issues with ECUs, sensors, and other electronic components.
• Invalid warranties: Some manufacturers may void warranties if an incorrect battery type is installed.

If your Sprinter has an auxiliary battery, these are also almost exclusively AGM batteries, designed to handle accessory loads without impacting the main starting battery. Always check your vehicle's owner's manual or a Mercedes-Benz dealership for absolute confirmation of the correct battery type for your specific VIN.

Post-installation relearn / reset procedure

After replacing the battery in a 2017 Mercedes-Benz Sprinter, a "relearn" or "reset" procedure is often necessary to ensure all vehicle systems function correctly. While some basic functions may return automatically, some systems might require manual reset or a diagnostic tool.

Basic Reset (Self-relearning may occur):

1. Install the new battery securely, ensuring clean and tight terminals.
2. Start the vehicle and let it idle for 5-10 minutes. The onboard computer will begin to re-initialize various systems.
3. Drive the vehicle for a short period at varying speeds. This helps the transmission and other adaptable systems relearn driving patterns.

Manual Resets (Commonly Needed):

• Power Windows: If windows don't operate with one-touch functionality, roll each window down completely, hold the switch for 2-3 seconds, then roll it up completely and hold the switch for 2-3 seconds.
• Sunroof (if equipped): Open the sunroof completely, then close it completely, holding the switch for a few seconds at each end of the travel.
• Steering Angle Sensor: Turn the steering wheel fully to the left, then fully to the right, then center it. The ESP/traction control light should extinguish.
• Radio/Infotainment System: You may need to enter a security code if applicable (refer to your owner's manual) and reset preset stations and clock.

Advanced Diagnostic Tool (Potentially Required):

• For some Sprinter models and deeper system resets, especially concerning the battery management system (BMS) or certain error codes, a professional diagnostic tool (like Mercedes-Benz STAR diagnostic system or an equivalent) may be necessary to register the new battery with the vehicle's ECU. This helps the vehicle optimize charging for the new battery and clear any lingering fault codes.

If you experience persistent warning lights or unusual behavior after a battery replacement, it's best to consult with a qualified Mercedes-Benz technician.

Signs of a failing battery

Recognizing the signs of a failing battery can save you from being stranded. For your 2017 Mercedes-Benz Sprinter, look out for:

• Slow cranking: The engine turns over sluggishly when you try to start it.
• Dim lights/electrical issues: Headlights, interior lights, or the dashboard display may appear dim, especially when starting the vehicle. Other electrical components might operate intermittently.
• "Check Battery" or "Battery Warning" light: An illuminated battery-shaped light on your dashboard is a clear indicator of a charging system or battery issue.
• Corrosion on terminals: White or bluish powdery buildup around the battery posts can indicate a leaking battery or poor connection.
• Bloated or cracked battery case: A physically swollen or damaged battery case is a sign of internal failure.
• Foul odor: A sulfuric or rotten egg smell indicates a leaking battery or overcharging issues.
• Frequent need for jump-starts: If your Sprinter regularly needs a jump-start, the battery is likely at the end of its life.
• Inconsistent start/stop operation: If your Sprinter has a start/stop system, its inconsistent operation or complete disablement can be an early sign of a weak auxiliary or main battery.

Common battery issues for this generation

Sprinters, like many modern vehicles, place significant demands on their batteries. Common issues for the 2017 generation include:

• High parasitic drain: The numerous ECUs and electronic systems in a Sprinter can draw power even when the vehicle is off, leading to a drained battery if the vehicle sits for extended periods.
• Failure to use correct AGM battery: As mentioned, installing an incorrect flooded battery type can lead to premature failure due to the vehicle's sophisticated charging system.
• Auxiliary battery failure: The auxiliary battery, if equipped, can fail independently of the main battery, leading to issues with accessories, start/stop functionality, or specific error codes.
• Charging system issues: While less common than battery failure, issues with the alternator or voltage regulator can lead to undercharging or overcharging, both detrimental to battery life.
• Environmental factors: Extreme hot or cold temperatures can significantly shorten battery lifespan.

Routine battery testing, especially as your battery ages (3-5 years), can help identify potential issues before they leave you stranded.

Find a trusted shop on Repairius.