GarageDex

2021 Mercedes-Benz E-Class Battery Size

The 2021 Mercedes-Benz E-Class uses a BCI Group 49 battery, rated about 850-925 cold cranking amps (AGM).

BCI Group Size49The case-size code that sets the physical fit and terminal layout.Verified fit
Battery type (OEM)
AGM
Cold cranking amps (CCA)
850-925
Terminal position
Standard-terminal layout
Dimensions (L×W×H)
353×175×190 mm
Location
Under the hood (engine bay)

W213; H8 (49) AGM. Some trims add a small aux battery. Always confirm against your owner's manual or current battery label.

Verified fitLast checked
Sources: PowerTex
This vehicle ships with an AGM battery from the factory, which is common on models with engine stop-start. Replace it with an AGM of the same group, not a standard flooded battery, or you risk shorter life and dashboard warnings. The 850-925 CCA rating is on the higher end, typical of larger engines and trucks, and it matters most for reliable cold-weather starts. Group 49 defines the case size and terminal layout (standard-terminal layout), so any reputable Group 49 battery will fit the tray and connect correctly.

Where to buy a Group 49 battery

A car battery is heavy and expensive to ship, so buying in person (Walmart, Costco, or a local auto-parts store) often beats online once you count free installation and the core-charge refund on your old battery. To compare prices and reviews online:

Search Group 49 batteries on Amazon850+ CCA, AGM

As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.

Frequently asked

What size battery does a 2021 Mercedes-Benz E-Class take?

The 2021 Mercedes-Benz E-Class uses a BCI Group 49 battery, rated around 850-925 cold cranking amps.

Does the 2021 Mercedes-Benz E-Class need an AGM battery?

Yes - this configuration is fitted with an AGM battery from the factory, typically required on start-stop equipped trims.

How many cold cranking amps (CCA) does it need?

Aim for roughly 850-925 CCA. Choosing at or above the OEM rating is fine; going below can cause hard starts in cold weather.

Where is the battery located?

Under the hood (engine bay). Standard-terminal layout.

Other vehicles that use Group 49

See all cars that take a Group 49 battery →
2026 Alfa Romeo Giulia2025 Alfa Romeo Giulia2024 Alfa Romeo Giulia2023 Alfa Romeo Giulia

Also check the wiper sizes for your 2021 Mercedes-Benz E-Class →