The 2027 Mercedes-Benz GLC 400 4Matic Electric drove 392 miles on a single charge in Edmunds' real-world EV range test, published Monday, Oct. 19, 2026. That's 61 miles, or 18.4%, more than its 331-mile EPA estimate. It also used 28.4 kWh per 100 miles, about 14% less energy than the EPA's 33 kWh/100 mi figure.
How Edmunds tests
Edmunds doesn't just set cruise control at 70 mph on a freeway. Its route is 60% city and 40% highway driving at an average of 40 mph, staying within 5 mph of posted limits, in the car's most efficient drive mode with climate control on auto at 72 degrees.
How it compares
- Mercedes GLC 400 Electric: 392 miles
- 2024 Porsche Macan 4 Electric: 352 miles
- 2025 Cadillac Optiq: 339 miles
- 2027 Audi Q6 E-tron Prestige: 337 miles
All three rivals also beat their EPA estimates in Edmunds' testing, but none matched the GLC. Edmunds hasn't yet tested BMW's new iX3, which it calls the GLC's closest direct competitor.
The specs
The GLC 400 has two motors making 483 hp and 590 lb-ft, a 94 kWh usable battery and DC fast charging up to 330 kW. Mercedes estimates a 10% to 80% charge takes about 22 minutes under ideal conditions. A single-motor, rear-drive GLC 300+ with 369 hp is also offered; Edmunds hasn't range-tested it yet.
What it means for Tesla
The GLC Electric is a direct shot at the Model Y's home turf, the luxury compact SUV segment, where the Model Y took 57.9% of California registrations so far this year, according to the CNCDA (see our California Q3 story). German makers are also climbing innovation rankings that Tesla just slipped in (CAM's 2026 report), with range and efficiency among the main factors.