Mercedes CLA 350 4Matic Beats Its EPA Range by 73 Miles — And What That Means for Your Charging Setup

Every so often an EV posts a range number that makes you do a double take. The 2027 Mercedes-Benz CLA just did exactly that. In Tom Moloughney's 70 mph highway range test for his State of Charge YouTube channel, the all-wheel drive CLA 350 4Matic covered 385 miles on a single charge — 73 miles more than its 312-mile EPA rating.

That's the wrong direction from what usually happens. Most EVs fall short of their EPA number at sustained highway speeds, which is why so many owners plan road trips with a mental haircut applied to the dash estimate. The CLA went the other way, and it did it on the New Jersey Turnpike in summer, on tires inflated to Mercedes' recommended pressures — no hypermiling tricks, no cherry-picked conditions. If anything, the Turnpike's famously beat-up surface should have cost it range.

The Number Behind the Number: 4.44 mi/kWh

The CLA carries an 85-kWh pack, which is generous for the smallest and cheapest electric Mercedes sold in North America. But the battery isn't the whole story. Moloughney recorded an average of 4.44 miles per kilowatt-hour over the full run — efficiency territory usually reserved for cars engineered obsessively around the drag coefficient.

For context on where that lands:

  • Lucid Air: has proven capable of roughly 5.0 mi/kWh
  • Tesla Model 3: managed 4.6 mi/kWh in Edmunds' testing
  • Mercedes CLA 350 4Matic: 4.44 mi/kWh at a steady 70 mph

That's a dual-motor luxury sedan hanging with cars built specifically to sip electrons. Mercedes got there with hardware choices like silicon carbide inverters and a two-speed gearbox — the kind of engineering that quietly pays off every single mile.

The Consistency Is the Real Headline

Here's the detail we found most interesting. The CLA's efficiency barely sagged as the battery drained:

  • First 95 miles: 4.50 mi/kWh
  • Next 100 miles: 4.52 mi/kWh (it actually improved)
  • Next 95 miles: 4.46 mi/kWh
  • Final 95 miles: 4.44 mi/kWh

A flat efficiency curve is worth more to a road-tripper than a big headline range figure. It means the trip planner's math at 20% state of charge is about as trustworthy as its math at 90%, and you're not watching your estimated miles evaporate in the last leg before a charging stop.

Moloughney's result isn't a fluke, either. Car and Driver's 75 mph highway test — a faster, harder test — returned 340 miles. Two independent runs, both comfortably above the EPA figure.

Note the Drivetrain Twist

One quirk worth flagging if you're shopping: the EPA rates the single-motor, rear-wheel drive CLA at 374 miles, well above the 4Matic's 312. Moloughney tested the all-wheel drive model — the one with the lower rating — and still beat it by 73 miles. The 350 4Matic starts at $51,950, which makes the luxury-plus-range combination look like genuine value.

The lesson for any EV owner: EPA numbers are a standardized yardstick, not a promise. Your real-world range depends on speed, temperature, tire pressure, and how your car is set up — and those last two are squarely in your control.

What This Means for Your Own EV

You can't retrofit a two-speed gearbox into your Model Y. But the CLA's result is a useful reminder that highway efficiency is mostly a game of small, controllable factors — and a few of them live in your trunk or your garage.

  • Tire pressure is the cheapest range mod there is. Moloughney ran factory-recommended pressures, nothing exotic. Underinflated tires quietly tax every mile you drive. A decent portable inflator with a digital gauge — the kind that shuts off automatically at your target PSI — pays for itself in range and tire life. Check monthly and before any long trip, when the tires are cold.
  • Cut the aero penalty when you can. Roof racks, cargo boxes, and bike carriers are range killers at 70 mph. If you're not using yours this week, take it off. When you do need cargo capacity, an interior organizer or a trunk/frunk storage bin keeps gear inside the car where it costs you nothing aerodynamically.
  • Charge at home and the efficiency math gets even better. A car this efficient turns a modest home charging setup into plenty of daily range. A quality Level 2 charger or a capable mobile connector with the right NEMA adapter means you start most mornings full, and highway range becomes a road-trip concern rather than a daily one.
  • Carry the adapter you'd need on a bad day. Non-Tesla EVs road-tripping in North America increasingly lean on the Supercharger network, and Tesla owners still run into CCS and J1772 stations. Keeping the appropriate adapter in the car is the difference between a stop and a detour.
  • Precondition before you plug in. Efficient cars still charge best with a warm battery. Using your car's navigation to route to a fast charger typically triggers battery preconditioning automatically — a free habit that shortens stops.
  • Keep basic roadside gear aboard. Longer range means longer, more remote stretches between stops. A compact emergency kit, a tire repair kit, and a reflective warning triangle belong in every EV, regardless of how good the range test was.

The Takeaway

The CLA 350 4Matic is a reminder that the efficiency race is heating up across the whole market, not just at the top of the price sheet. For shoppers, it's a strong argument to look at real-world 70 mph test results alongside the EPA sticker — those tests reflect how you'll actually drive.

And for those of us already driving an EV, it's a nudge to handle the fundamentals. Correct tire pressure, clean aerodynamics, a reliable home charge, and the right adapter in the trunk won't get you 4.44 mi/kWh in a car that wasn't built for it — but they'll get you closer to your own car's ceiling, on every drive.

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