What is the battery capacity of the E class?
In short, the E-Class does not have a single battery figure. The 48V mild-hybrid variants use about a 0.5 kWh pack, while plug-in hybrids carry a larger 13.5 kWh gross battery (roughly 11–12 kWh usable). There is no fully electric E-Class; the all-electric models sit in the EQ family (EQE and EQS).
To understand how the number changes across the lineup, here is a breakdown by drivetrain and generation in recent years.
Breakdown by drivetrain
The following overview covers the main E-Class powertrains in recent years and their typical battery sizes.
- 48-volt mild-hybrid (MHEV): A small 48V battery used for engine-start/torque assist. Capacity is about 0.5 kWh (roughly half a kilowatt-hour).
- Plug-in hybrid (PHEV) – petrol/diesel variants: A larger battery for electric driving. Typical gross capacity is 13.5 kWh, with about 11–12 kWh usable. Real-world electric range under WLTP commonly around 50–60 km, depending on model/year and conditions.
- Diesel plug-in hybrids (where offered): Use the same 13.5 kWh gross pack and similar usable energy; WLTP ranges vary by configuration.
In practice, if you own or are considering an E‑Class, confirm the exact figure from the official brochure for your market and model year. The E‑Class family includes both mild-hybrid and plug-in variants, which explains the range in “battery capacity.”
Charging and practical use
Charging capabilities for E‑Class plug-in hybrids depend on the market and the exact model. Most recent PHEV versions support AC charging, with onboard chargers commonly delivering up to 3.7 kW or 7.4 kW in some markets. DC fast charging is generally not provided on these plug-in hybrids.
Effective electric-only range and the usable portion of the battery can vary with temperature, drive mode, and battery condition. Always consult the official spec sheet for your vehicle.
Summary
The E‑Class battery story is not a single figure. Mild-hybrid variants use about 0.5 kWh, while plug-in hybrids carry a 13.5 kWh gross pack (roughly 11–12 kWh usable). Fully electric models exist, but under the EQ brand (EQE/EQS), not the traditional E-Class. For precise numbers, check the exact model year and market brochure.
Which is faster, C300 or E300?
As you might expect, the C 300 can accelerate from 0 to 60 miles per hour in only 5.7 seconds. This is significantly faster than the E 300, which accelerates from 6.2 seconds. However, you'll also find that the 2019 Mercedes-Benz E 300 gives you more technology features.
Why does the Mercedes E-Class have two batteries?
The auxiliary battery in your Mercedes serves as a compact backup power source for essential systems like infotainment and engine stop-start features. In certain models, it also functions as a capacitor to stabilize electrical demands.
How much is a new battery for a Mercedes E-Class?
Mercedes-Benz E-Class Battery Replacement cost
| Independent garage estimate | Franchise dealer estimate | |
|---|---|---|
| £124 - £280 | £181 - £368 | Get exact price |
| £148 - £303 | £209 - £395 | Get exact price |
| £158 - £312 | £238 - £422 | Get exact price |
| £120 - £274 | £177 - £361 | Get exact price |
Which Mercedes has a 7.3 V12?
The Mercedes-Benz W124 7.3 Brabus V12. That's one of the wildest, most excessive sleepers of the 1990s—a W124 E-Class stuffed with the massive 7.3-liter V12 from Brabus, based on the M120 engine.
