For enhanced safety, the front seat shoulder belts of the Toyota Avalon 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 A-Class 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 Avalon are reminded to check the back seat if they opened the rear door before starting out. The A-Class doesn't offer a back seat reminder.

The Avalon has standard Whiplash Injury Lessening Seats (WIL), which use a specially designed seat to protect the driver and front passenger from whiplash. During a rear-end collision, the WIL system allows the backrest to travel backwards to cushion the occupants and the headrests move forward to prevent neck and spine injuries. The A-Class doesn't offer a whiplash protection system.

The Avalon has a standard Secondary Collision Brake, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The A-Class doesn't offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.

Over 200 people are killed each year when backed over by motor vehicles. The Avalon Limited/Touring offers optional Rear Cross-Traffic Braking that uses rear sensors to monitor and automatically apply the brakes to prevent a rear collision. The A-Class doesn't offer backup collision prevention brakes.

The Avalon'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 A-Class.

To help make backing out of a parking space safer, the Avalon's standard cross-path warning system uses sensors in the rear bumper to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. The A-Class doesn't offer a cross-path warning system.

Both the Avalon and the A-Class have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger 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 and available around view monitors.

For its top level performance in IIHS driver and passenger-side small overlap frontal, moderate overlap frontal, side impact, roof strength and head restraint tests, its standard front crash prevention system, and its headlight's “Good” rating, the Insurance Institute for Highway Safety grants the Avalon its highest rating: “Top Pick Plus” for 2019, a rating granted to only 103 vehicles tested by the IIHS. The A-Class has not been tested, yet.

Toyota's powertrain warranty covers the Avalon 1 year and 10,000 miles longer than Mercedes covers the A-Class. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 5 years or 60,000 miles. Coverage on the A-Class ends after only 4 years or 50,000 miles.

Toyota pays for scheduled maintenance on the Avalon for 2 years and 25000 miles. Toyota will pay for oil changes, lubrication and any other required maintenance. Mercedes doesn't pay scheduled maintenance for the A-Class.

There are over 3 times as many Toyota dealers as there are Mercedes dealers, which makes it much easier should you ever need service under the Avalon's warranty.

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 Avalon's reliability 25 points higher than the A-Class.

J.D. Power and Associates' 2020 Initial Quality Study of new car owners surveyed provide the statistics that show that Toyota vehicles are better in initial quality than Mercedes vehicles. J.D. Power ranks Toyota 19th in initial quality. With 25 more problems per 100 vehicles, Mercedes is ranked 30th.

J.D. Power and Associates' 2021 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Toyota vehicles are more reliable than Mercedes vehicles. J.D. Power ranks Toyota fourth in reliability, above the industry average. With 24 more problems per 100 vehicles, Mercedes is ranked 15th.

From surveys of all its subscribers, Consumer Reports' January 2021 Auto Issue reports that Toyota vehicles are more reliable than Mercedes vehicles. Consumer Reports ranks Toyota second in reliability. Mercedes is ranked 20th.

The Avalon's 3.5 DOHC V6 produces 113 more horsepower (301 vs. 188) and 46 lbs.-ft. more torque (267 vs. 221) than the A-Class' 2.0 turbo 4-cylinder.

As tested in Motor Trend the Toyota Avalon is faster than the Mercedes A-Class:

To lower fuel costs and make buying fuel easier, the Toyota Avalon uses regular unleaded gasoline. The A-Class requires premium, which can cost 20 to 55 cents more per gallon.

The Avalon XLE's standard fuel tank has a gallon more fuel capacity than the A-Class (14.5 vs. 13.5 gallons), for longer range between fill-ups. The Avalon Limited/Touring's standard fuel tank has 2.3 gallons more fuel capacity than the A-Class (15.8 vs. 13.5 gallons).

An eight-speed automatic is standard on the Toyota Avalon, for better acceleration and lower engine speed on the highway. Only a seven-speed automatic is available for the A-Class.

The Avalon stops shorter than the A-Class:

For better traction, the Avalon has larger standard tires than the A-Class (215/55R17 vs. 205/55R17). The Avalon Limited's tires are larger than the largest tires available on the A-Class (235/45R18 vs. 225/40R19).

The Avalon has a standard space-saver spare tire so you can replace a flat tire and drive to have the flat repaired or replaced. A spare tire isn't available on the A-Class; 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 A-Class don't have a run-flat feature, either.

For a smoother ride and more stable handling, the Avalon's wheelbase is 5.6 inches longer than on the A-Class (113 inches vs. 107.4 inches).

For better handling and stability, the average track (width between the wheels) on the Avalon is 1.1 inches wider in the front and 2.6 inches wider in the rear than the track on the A-Class.

The Avalon Touring uses computer-generated active noise cancellation to help remove annoying noise and vibration from the passenger compartment, especially at low frequencies. The A-Class doesn't offer active noise cancellation.

Because it has more passenger and cargo room, the EPA rates the Avalon a Mid-size car, while the A-Class is rated a Compact.

The Avalon has 11.3 cubic feet more passenger volume than the A-Class (104.3 vs. 93).

The Avalon has .3 inches more front legroom, 3.2 inches more front shoulder room, .3 inches more rear headroom, 6.4 inches more rear legroom and 3.1 inches more rear shoulder room than the A-Class.

The Avalon has a much larger trunk than the A-Class (16.1 vs. 8.6 cubic feet).

To shield the driver and front passenger's vision over a larger portion of the windshield and side windows, the Avalon has standard extendable sun visors. The A-Class doesn't offer extendable visors.

The Avalon has standard heated front seats. Heated front seats cost extra on the A-Class. The Avalon Limited/Touring also has standard heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren't available in the A-Class.

Insurance will cost less for the Avalon owner. The Complete Car Cost Guide estimates that insurance for the Avalon will cost $505 to $1460 less than the A-Class over a five-year period.

The Toyota Avalon has won recognition from these important consumer publications: