The Mercedes-Benz B-Class is rated 84 MPGe (85 city, 82.5 highway) — that is not petrol economy but the distance it covers on 33.7 kWh, the energy held in one gallon. Drawn from a socket it needs 40.1 kWh per 100 miles, so 12,000 miles a year costs about $818 at $0.17 a kWh. The EPA's own annual figure for it is $900.
Every Mercedes-Benz B-Class version, compared
The Mercedes-Benz B-Class was rated in a single specification, so its consumption does not vary by version — only by model year. Yearly cost assumes 12,000 miles at $0.17 a kilowatt-hour.
| Version | Combined MPGe | City / Highway | Years | Charging per year |
|---|---|---|---|---|
| Electric | 85 / 82.5 | 2014–2015 | $818 |
What that actually costs
MPGe is an abstraction; the electricity bill is not. At 12,000 miles a year the Mercedes-Benz B-Class draws about 4812 kWh, which at $0.17 comes to the figures below.
| Measure | Value |
|---|---|
| Energy use | 40.1 kWh per 100 miles |
| Cost per mile | $0.068 |
| Charging per year | $818 |
| Charging over five years | $4,090 |
| Against other Electric cars | +$137 a year |
| EPA's own estimate | $900 a year |
City or highway — who is this car for
The Mercedes-Benz B-Class is one of the cars that does better in town than out of it — 85 in the city against 82.5 on the highway. That is $13 a year in favour of the commuter stuck in traffic, and it usually means a hybrid drivetrain recovering energy every time you brake.
| Measure | Value | Reading |
|---|---|---|
| City | 85 MPGe | $808 a year if you only drive in town |
| Highway | 82.5 MPGe | $832 a year if you mostly commute |
| Gap | -2.5 MPGe (-3%) | Reversed — it does better in town than on the open road |
How the B-Class changed over the years
Combined figure across the 2 model years the B-Class was rated in, all of them at 84 MPGe.
| Model year | Combined MPGe | City / Highway | Versions offered | Charging per year |
|---|---|---|---|---|
| 2015 | 85 / 82 | 1 | $818 | |
| 2014 | 85 / 83 | 1 | $818 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 2 EPA ratings of the Mercedes-Benz B-Class — 1 engine across 2014–2015. The mileage is EPA's laboratory figure, unchanged; the yearly bill is ours, at 12,000 miles and $0.17 a kilowatt-hour, against EPA's own estimate of $900. Full method.
Frequently asked questions
What is the Mercedes-Benz B-Class rated at?
84 MPGe combined on average — 85 in the city and 82.5 on the highway, per EPA ratings across 2014–2015. MPGe is distance covered on 33.7 kWh, the energy in a gallon of petrol — the car itself takes none.
How much does a Mercedes-Benz B-Class cost to charge per year?
About $818 at 12,000 miles and $0.17 a kilowatt-hour — roughly $4,090 over five years, or 0.068 dollars a mile.
Which B-Class version is the most efficient?
The Electric at 84 MPGe.
Is the B-Class efficient compared with similar cars?
Against other Electric cars it sits below the average of 101 MPGe, computed across 426 ratings.
Are these real-world B-Class figures?
No — they are EPA laboratory ratings, the same ones printed on the window sticker, and EPA's own annual fuel estimate for the Mercedes-Benz B-Class is $900 against the $818 we compute at 12,000 miles. Expect a little worse in practice: the spread between the city and highway figures is smaller than the spread between two drivers of the same one.
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