2015 head-to-head · Small SUV
2015 BMW X3 Diesel vs Mercedes-Benz GLK-Class Diesel
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
AWD · 2.0L 4-cyl turbo · 8-speed automatic · 30 MPG
4WD · 2.1L 4-cyl turbo · 7-speed automatic · 27 MPG
The 2015 BMW X3 Diesel is the cheaper one to run. Driving 15,000 miles a year with $3.70/gal diesel fuel, it costs about $1,850 a year to fuel (30 MPG), versus $2,056 for the 2015 Mercedes-Benz GLK-Class Diesel (27 MPG). That's roughly $206 a year, or about $1,028 over five years.
Your numbers
Change these to match your driving and local prices. Every figure and chart on this page updates.
Fuel cost over 10 years
- BMW X3 Diesel
- Mercedes-Benz GLK-Class Diesel
Side by side
| BMW X3 Diesel | Mercedes-Benz GLK-Class Diesel | |
|---|---|---|
| $1,850 | Your annual fuel cost | $2,056 |
| 30 MPG | Combined efficiency | 27 MPG |
| 27 MPG | City | 24 MPG |
| 33 MPG | Highway | 32 MPG |
| 345 g/mi | Tailpipe CO₂ (g/mi) | 371 g/mi |
| 7/10 | EPA fuel economy score | 7/10 |
| 6/10 | EPA greenhouse gas score | 6/10 |
| Diesel | Powertrain | Diesel |
| Diesel | Fuel | Diesel |
| 2.0L 4-cyl turbo | Engine / motor | 2.1L 4-cyl turbo |
| 8-speed automatic | Transmission | 7-speed automatic |
| AWD | Drivetrain | 4WD |
✓ marks the better value. EPA scores run 1–10 (10 is best). Volumes come from the EPA interior volume index and aren't published for every body style.
BMW X3 Diesel vs Mercedes-Benz GLK-Class Diesel across model years
- BMW X3 Diesel
- Mercedes-Benz GLK-Class Diesel
Annual fuel cost of the most efficient configuration of each model year, at your prices. Click a point to open that year.
How they differ
Among 60 2015 small SUVs, the BMW X3 Diesel ranks 19th and the Mercedes-Benz GLK-Class Diesel 35th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2015 BMW X3 Diesel or the 2015 Mercedes-Benz GLK-Class Diesel?
Measured by cost to drive, the BMW X3 Diesel. The BMW X3 Diesel is rated 30 MPG combined and the Mercedes-Benz GLK-Class Diesel 27 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2015 BMW X3 Diesel vs. the Mercedes-Benz GLK-Class Diesel per year?
At 15,000 miles a year with $3.70/gal diesel fuel, about $1,850 for the BMW X3 Diesel and $2,056 for the Mercedes-Benz GLK-Class Diesel.
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