Compare the2025 Hyundai SonataVS 2025 Mercedes CLA

For enhanced safety, the front seat shoulder belts of the Hyundai Sonata are height-adjustable to accommodate a wide variety of driver and passenger heights. A better fit can prevent injuries and the increased comfort also encourages passengers to buckle up. The Mercedes CLA doesn’t offer height-adjustable seat belts.

In the past twenty years hundreds of infants and young children have died after being left in vehicles, usually by accident. When turning the vehicle off, drivers of the Sonata are reminded to check the back seat if they opened the rear door before starting out. The CLA doesn’t offer a back seat reminder.

In a Vehicle-to-Vehicle Frontal Crash Prevention 2.0 test conducted by the Insurance Institute for Highway Safety (IIHS), the Hyundai Sonata achieved a “Acceptable” rating - the second highest possible - for its performance in forward collision warning and automatic braking systems, demonstrating its excellent capabilities in preventing collisions. The Mercedes CLA has not been tested.

The Sonata’s standard lane departure warning system alerts a temporarily inattentive driver when the vehicle begins to leave its lane and gently nudges the vehicle back towards its lane. A lane departure warning system costs extra on the CLA.

Both the Sonata and the CLA have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front and rear seatbelt pretensioners, front wheel drive, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, blind spot warning systems, rearview cameras, rear cross-path warning, driver alert monitors and available all wheel drive.

The Sonata comes with a full 5-year/60,000-mile basic warranty, which covers the entire car and includes 24-hour roadside assistance. The CLA’s 4-year/50,000-mile basic warranty expires 1 year or 10,000 miles sooner.

Hyundai’s powertrain warranty covers the Sonata 6 years and 50,000 miles longer than Mercedes covers the CLA. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 10 years or 100,000 miles. Coverage on the CLA ends after only 4 years or 50,000 miles.

The Sonata’s corrosion warranty is 2 years longer than the CLA’s (7 vs. 5 years).

Hyundai pays for scheduled maintenance on the Sonata for 3 years and 36,000 miles. Hyundai will pay for oil changes, tire rotations, air filter replacements, cabin filter replacement, brake fluid replacement, inspections, and any other required maintenance. Mercedes doesn’t pay scheduled maintenance for the CLA.

There are over 2 times as many Hyundai dealers as there are Mercedes dealers, which makes it much easier should you ever need service under the Sonata’s warranty.

To reliably power the ignition and other systems and to recharge the battery, the Sonata has a standard 150-amp alternator. The CLA’s 115-amp alternator isn’t as powerful.

A reliable vehicle saves its owner time, money and trouble. Nobody wants to be stranded or have to be without a vehicle while it’s being repaired. Consumer Reports rates the Sonata’s reliability 21 points higher than the CLA.

J.D. Power and Associates’ 2024 Initial Quality Study of new car owners surveyed provide the statistics that show that Hyundai vehicles are better in initial quality than Mercedes vehicles. J.D. Power ranks Hyundai third in initial quality, above the industry average. With 44 more problems per 100 vehicles, Mercedes is ranked 21st, below the industry average.

J.D. Power and Associates’ 2024 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Hyundai vehicles are more reliable than Mercedes With 20 fewer problems per 100 vehicles in the first three years of ownership, J.D. Power ranks Hyundai higher than Mercedes.

The Sonata N Line’s standard 2.5 turbo 4-cylinder produces 69 more horsepower (290 vs. 221) and 53 lbs.-ft. more torque (311 vs. 258) than the CLA’s 2.0 turbo 4-cylinder hybrid.

As tested in Car and Driver the Sonata N Line 2.5 turbo 4-cylinder is faster than the Mercedes CLA:

On the EPA test cycle the Sonata SE 2.5 DOHC 4-cylinder FWD gets better fuel mileage than the CLA 250 FWD (28 city/38 hwy vs. 26 city/36 hwy).

To lower fuel costs and make buying fuel easier, the Hyundai Sonata uses regular unleaded gasoline. The CLA requires premium, which can cost on average about 84.9 cents more per gallon.

The Sonata has 2.4 gallons more fuel capacity than the CLA (15.9 vs. 13.5 gallons), for longer range between fill-ups.

The Sonata N Line’s launch control uses engine electronics to hold engine RPM’s precisely in order to provide the most stable and rapid acceleration possible, using all of the available traction. The CLA doesn’t offer launch control.

For better stopping power the Sonata N Line’s front brake rotors are larger than those on the CLA:

The Sonata stops shorter than the CLA:

For better traction, the Sonata N Line’s tires are larger than the largest tires available on the CLA (245/40R19 vs. 225/45R18).

The Sonata has a standard space-saver spare (not available on N Line) so you can replace a flat tire and drive to have the flat repaired or replaced. A spare tire isn’t available on the CLA; it requires you to depend on its run-flat tires, which limits mileage and speed before they are repaired. If a run-flat is damaged beyond repair by a road hazard your vehicle will have to be towed. Some tire options on the CLA don’t have a run-flat feature, either.

For a smoother ride and more stable handling, the Sonata’s wheelbase is 4.4 inches longer than on the CLA (111.8 inches vs. 107.4 inches).

Because it has more passenger and cargo room, the EPA rates the Sonata a Large car, while the CLA is rated a Compact.

The Sonata has 15.4 cubic feet more passenger volume than the CLA (104.4 vs. 89).

The Sonata has 1.5 inches more front headroom, 4.3 inches more front legroom, 2.8 inches more front shoulder room, 2.1 inches more rear headroom, .9 inches more rear legroom and 2.1 inches more rear shoulder room than the CLA.

The Sonata has a much larger trunk than the CLA (15.6 vs. 11.6 cubic feet).

A low lift-over trunk design makes loading and unloading the Sonata easier. The Sonata’s trunk lift-over height is 27 inches, while the CLA’s liftover is 30.1 inches.

Consumer Reports rated the Sonata’s headlight performance “Fair,” a higher rating than the CLA’s headlights, which were rated “Poor.”

To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the Sonata has standard extendable sun visors. The CLA doesn’t offer extendable visors.

J.D. Power and Associates rated the Sonata second among midsize cars in owner reported satisfaction. This includes how well the vehicle performs and satisfies its owner’s expectations. The CLA isn’t in the top three in its category.

The Hyundai Sonata outsold the Mercedes CLA by over five to one during 2024.