Compare the2023 Mercedes EQSVS 2023 Hyundai Ioniq 5

Safety
Engine
Fuel Economy and Range
Transmission
Brakes and Stopping
Tires and Wheels
Suspension and Handling
Chassis
Passenger Space
Cargo Capacity
Ergonomics
Recommendations

Safety

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The EQS’ pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The Ioniq 5 doesn’t offer pre-crash pretensioners.

The Mercedes EQS has standard driver and front passenger side knee airbags mounted low on the dashboard. These airbags helps prevent the driver and front passenger from sliding under their seatbelts or the main frontal airbags; this keeps them better positioned during a collision for maximum protection. Knee airbags also help keep the legs from striking the dashboard, preventing knee and leg injuries in the case of a serious frontal collision. The Ioniq 5 doesn’t offer knee airbags.

The rear seatbelts optional on the EQS inflate when a collision is detected, helping to spread crash forces over a much larger area of the body and limiting head and neck movement. This can help prevent spinal and internal injuries. The Ioniq 5 doesn’t offer inflatable seatbelts.

The EQS’ standard pretensioning seatbelts also sense rear collisions and remove slack from the seatbelts to help protect the occupants from whiplash and other injuries. The Ioniq 5 doesn’t offer a whiplash protection system.

The EQS has a standard Post Collision Brake, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The Ioniq 5 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.

Both the EQS and the Ioniq 5 have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, lane departure warning systems, blind spot warning systems, rearview cameras, rear cross-path warning and driver alert monitors.

The Mercedes EQS weighs 913 to 1984 pounds more than the Hyundai Ioniq 5. The NHTSA advises that heavier cars are much safer in collisions than their significantly lighter counterparts.

Engine

The EQS has more powerful engines than the Ioniq 5:

	Horsepower	Torque
EQS 450+ electric motor	329 HP	419 lbs.-ft.
EQS 450+ 4MATIC electric motors	335 HP	590 lbs.-ft.
EQS 580 4MATIC electric motors	536 HP	633 lbs.-ft.
AMG EQS electric motors	751 HP	752 lbs.-ft.
Ioniq 5 Standard Range electric motor	168 HP	258 lbs.-ft.
Ioniq 5 Long Range electric motor	225 HP	258 lbs.-ft.
Ioniq 5 electric motors	320 HP	446 lbs.-ft.

As tested in Car and Driver the Mercedes EQS is faster than the Hyundai Ioniq 5 electric motors:

	EQS 580 4MATIC	AMG EQS	Ioniq 5
Zero to 60 MPH	3.7 sec	3 sec	4.5 sec
Zero to 100 MPH	9.1 sec	7.6 sec	12.6 sec
5 to 60 MPH Rolling Start	3.8 sec	3.3 sec	4.8 sec
Quarter Mile	12.1 sec	11.4 sec	13.2 sec
Speed in 1/4 Mile	114 MPH	119 MPH	102 MPH
Top Speed	131 MPH	154 MPH	117 MPH

Fuel Economy and Range

On the EPA test cycle the EQS 450+ 4MATIC gets better mileage than the Ioniq 5 AWD (101 city/105 hwy vs. 113 city/90 hwy MPGe).

The EQS can travel longer on a full charge than the Ioniq 5 on a full charge:

			Miles
EQS
	RWD	450+ Electric Motor	350 miles
	AWD	580 4MATIC Electric Motors	340 miles
		4MATIC Electric Motors	340 miles
		AMG Electric Motors	277 miles
Ioniq 5
	RWD	Long Range Electric Motor	303 miles
		Standard Range Electric Motor	220 miles
	AWD	Electric Motors	266 miles

Transmission

The EQS AMG’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 Ioniq 5 doesn’t offer launch control.

Brakes and Stopping

For better stopping power the EQS’ brake rotors are larger than those on the Ioniq 5:

	EQS	AMG EQS CCB	Ioniq 5
Front Rotors	15.4 inches	17.4 inches	12.8 inches
Rear Rotors	14.9 inches	14.9 inches	12.8 inches

The EQS’ standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the Ioniq 5 are solid, not vented.

The EQS AMG offers optional heat-treated ceramic brake rotors, which last ten to twenty times as long as conventional cast iron rotors, don’t rust, don’t fade during repeated high speed braking, and their lighter weight contribute to better braking, handling and acceleration. The Ioniq 5 doesn’t offer ceramic brake rotors.

The EQS stops much shorter than the Ioniq 5:

	EQS	Ioniq 5
70 to 0 MPH	167 feet	179 feet	Car and Driver
60 to 0 MPH	115 feet	123 feet	Motor Trend

Tires and Wheels

For better traction, the EQS has larger standard tires than the Ioniq 5 (255/45R20 vs. 235/55R19). The AMG EQS’ tires are larger than the largest tires available on the Ioniq 5 (275/40R21 vs. 255/45R20).

The EQS’ standard tires provide better handling because they have a lower 45 series profile (height to width ratio) that provides a stiffer sidewall than the Ioniq 5’s standard 55 series tires. The EQS’ optional tires have a lower 35 series profile than the Ioniq 5 Limited AWD’s 45 series tires.

For better ride, handling and brake cooling the EQS has standard 20-inch wheels. Smaller 19-inch wheels are standard on the Ioniq 5. The EQS’ optional 22-inch wheels are larger than the 20-inch wheels on the Ioniq 5 Limited AWD.

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires available on the EQS can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The Ioniq 5 doesn’t offer run-flat tires.

Suspension and Handling

The front and rear suspension of the EQS uses air springs for a smoother, controlled ride than the Ioniq 5, which uses coil springs. Air springs maintain proper ride height and ride more smoothly.

The EQS has a standard driver-adjustable suspension system. It allows the driver to choose between an extra-supple ride, reducing fatigue on long trips, or a sport setting, which allows maximum control for tricky roads. The Ioniq 5’s suspension doesn’t offer adjustable shock absorbers.

The EQS has a standard automatic front and rear load leveling suspension to keep ride height level with a heavy load or when towing. The EQS’ height leveling suspension allows the driver to raise ride height for better off-road clearance and then lower it again for easier entering and exiting and better on-road handling. The Ioniq 5 doesn’t offer a load leveling suspension.

The EQS’ drift compensation steering can automatically compensate for road conditions which would cause the vehicle to drift from side to side, helping the driver to keep the vehicle straight more easily. The Ioniq 5 doesn’t offer drift compensation steering.

For a smoother ride and more stable handling, the EQS’ wheelbase is 8.3 inches longer than on the Ioniq 5 (126.4 inches vs. 118.1 inches).

For better handling and stability, the average track (width between the wheels) on the EQS is 1.3 inches wider in the front and 1.4 inches wider in the rear than the average track on the Ioniq 5.

The AMG EQS 4MATIC handles at .92 G’s, while the Ioniq 5 Limited AWD pulls only .85 G’s of cornering force in a Car and Driver skidpad test.

For better maneuverability, the EQS w/10° rear-wheel steering’s turning circle is 3.5 feet tighter than the Ioniq 5’s (35.8 feet vs. 39.3 feet). The EQS’ turning circle is .3 feet tighter than the Ioniq 5’s (39 feet vs. 39.3 feet).

Chassis

The design of the Mercedes EQS amounts to more than styling. The EQS has an aerodynamic coefficient of drag of .2 Cd. That is significantly lower than the Ioniq 5 (.288) and many sports cars. A more efficient exterior helps keep the interior quieter and helps the EQS get better fuel mileage.

The EQS uses computer-generated active noise cancellation to help remove annoying noise and vibration from the passenger compartment, especially at low frequencies. The Ioniq 5 doesn’t offer active noise cancellation.

Passenger Space

The EQS has .6 inches more front headroom, 1.8 inches more front shoulder room, 1 inch more rear legroom and 1.4 inches more rear shoulder room than the Ioniq 5.

Cargo Capacity

The EQS has a larger cargo volume with its rear seat folded than the Ioniq 5 with its rear seat folded (63 vs. 59.3 cubic feet).

A standard locking glovebox keeps your small valuables safer in the EQS. The Ioniq 5 doesn’t offer locking storage for small valuables.

Ergonomics

Unlike the driver-only memory seat and mirrors in the Ioniq 5 Limited, the EQS has standard driver and passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position and outside mirror angle and the front passenger seat also adjusts to the new passenger’s preset preferences.

The EQS’ front and rear power windows all open or close fully with one touch of the switches, making it more convenient at drive-up windows and toll booths, or when talking with someone outside the car. The Ioniq 5’s standard passenger windows don’t open or close automatically. With the Ioniq 5 SEL/Limited’s power windows, only the front windows open or close automatically.

If the windows are left open on the EQS the driver can close them all from a distance using the remote. On a hot day the driver can also lower the windows the same way. The driver of the Ioniq 5 can only close the windows from inside the vehicle, with the ignition on.

The EQS’ rain-sensitive wipers adjust their speed and turn on and off automatically based on the amount of rainfall on the windshield. This allows the driver to concentrate on driving without constantly adjusting the wipers. The Ioniq 5’s standard manually variable intermittent wipers have to be constantly adjusted.

To help drivers avoid possible obstacles, the EQS has standard cornering lights to illuminate around corners when the turn signals are activated. The Ioniq 5 doesn’t offer cornering lights. The EQS also has standard adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle.

The EQS’ standard rear and side view mirrors have an automatic dimming feature. These mirrors can be set to automatically darken quickly when headlights shine on them, keeping following vehicles from blinding or distracting the driver. The Ioniq 5 offers an automatic rear view mirror, but its side mirrors don’t dim.

Both the EQS and the Ioniq 5 have standard heated front seats. The EQS also offers optional heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the Ioniq 5.

The EQS has standard front air conditioned seats and offers them optionally in the rear. This keeps the passengers comfortable and takes the sting out of hot seats in summer. The Ioniq 5 doesn’t offer air-conditioned seats in the rear.

The EQS offers optional massaging front and rear seats in order to maximize comfort and eliminate fatigue on long trips. Massaging seats aren’t available in the Ioniq 5.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Mercedes EQS has a standard wireless phone charging system (Qi) in the center console and one for the rear passengers. Only the Ioniq 5 SEL/Limited offers wireless charging.

Recommendations

J.D. Power and Associates rated the EQS first among large premium cars in owner reported satisfaction. This includes how well the vehicle performs and satisfies its owner’s expectations. The Ioniq 5 was rated second in its category.