Mercedes-Benz GLB Electric vs Smart #5

Side-by-Side Specs

Charging Speed

The Smart #5 has the higher published DC fast-charging figure at 200 kW, which is roughly 18% higher than the Mercedes-Benz GLB Electric at 170 kW. In practice, that figure only tells part of the story. The charging curve, battery temperature, and state of charge all affect how quickly your car actually charges.

For the 10-80% charge (the most common DC fast charging scenario), the Smart #5 finishes in about 28 minutes, which is 2 minutes quicker than the Mercedes-Benz GLB Electric at 30 minutes. On a road trip, that difference adds up over multiple stops.

Range and Efficiency

The Smart #5 has a WLTP rated range of approximately 550 km, which is roughly 5 km more than the Mercedes-Benz GLB Electric at approximately 545 km. WLTP is a standardized lab test. Expect your actual range to be lower, varying with speed, weather, terrain, and driving style.

Efficiency matters more than battery size for daily driving costs. The Mercedes-Benz GLB Electric consumes 183 Wh/km, compared to 202 Wh/km for the Smart #5. That means the Mercedes-Benz GLB Electric uses less energy per kilometer, which translates to lower charging costs and fewer charging stops on longer drives.

A more efficient car does not always mean more range. Battery size plays a role too. The Smart #5 has approximately 96 kWh of useable battery , while the Mercedes-Benz GLB Electric has approximately 85 kWh.

Which One Should You Choose?

If fast charging is your priority, the Smart #5 has the higher published DC figure (up to 200 kW) while matching the quickest published 10-80% time at approximately 28 minutes. For long road trips, published stop time matters more than the headline kW number alone.

For AC charging (home wallboxes, workplace chargers, and public street chargers), the Smart #5 supports up to 22 kW, compared to 11 kW for the Mercedes-Benz GLB Electric. In Europe, many public chargers are 22 kW AC, so this difference can mean charging roughly twice as fast at those locations.

If you mostly charge at home or at work and care more about daily driving costs, the Mercedes-Benz GLB Electric is the more efficient choice at 183 Wh/km. Lower consumption means lower electricity bills over time.

For maximum range between charges, the Smart #5 has a WLTP rated range of approximately 550 km, which is roughly 5 km more. Both are capable EVs. The best choice depends on how you charge and how far you drive.