The 2027 Mercedes-Benz GLC 400 4Matic EV has outperformed its official range rating in an independent road test, travelling 392 miles on a single charge. The EPA estimates the electric SUV's range at up to 331 miles.
The result came from the real-world range test run by Edmunds. The 61-mile gap between the test figure and the federal estimate amounts to about 18% extra distance, which could add several more days of commuting between charges.
Efficiency numbers were similarly strong. The GLC consumed 28.4 kWh per 100 miles during the test, roughly 14% less than the 33 kWh per 100 miles in its official EPA rating.
The Mercedes also finished ahead of most rivals evaluated under the same procedure. The 2027 Volvo EX60 P10 AWD covered 352 miles, the 2025 Cadillac Optiq went 339 miles, and the 2027 Audi Q6 E-Tron Prestige managed 337 miles.
Edmunds designed its test to approximate everyday driving more closely than standard lab-based estimates. The route is made up of 60% city and 40% highway driving at an average speed of 40 mph. The vehicle stays within 5 mph of the posted speed limit, and the climate control is set to auto at 72 degrees.
Some readers have cautioned against reading too much into the figure. One commenter on the original report argued that Edmunds uses a lower average speed than the EPA does, and that other testers who run highway-only trials find vehicles falling short of their EPA numbers. In that view, the results are what should be expected.
Charging speed was not part of the evaluation. The GLC 400's 94 kWh battery supports DC fast charging at up to 330 kW, and Mercedes says it can go from 10% to 80% in about 22 minutes.
The result reflects a broader trend in the market. The number of electric cars offering 300 miles or more of EPA-estimated range has grown from a single model in 2016, the Tesla Model S 90D, to around 60 by the end of 2026. Several new 2027 models are approaching 400 miles of EPA range.
A recent BMW Group study suggests that buyers' range expectations may exceed their needs. It found that 73% of Americans say 75 miles or less would cover their daily driving, yet 42% want at least 300 miles before considering an EV. Only 18% of respondents said they wanted 400 miles or more.
