2019 Mercedes E-Class Wagon vs. 2019 Lexus RX Series

Detailed Review, Specifications & Comparison

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Safety

The E-Class Wagon’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The RX Series doesn’t offer pre-crash pretensioners.

To provide maximum traction and stability on all roads, All-Wheel Drive is standard on the E-Class Wagon. But it costs extra on the RX Series.

The E-Class Wagon’s driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The RX Series doesn’t offer a driver alert monitor.

Both the E-Class Wagon and the RX Series have standard driver and passenger frontal airbags, front and rear side-impact airbags, driver knee airbags, side-impact head airbags, front and rear 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, rearview cameras, available lane departure warning systems, blind spot warning systems, around view monitors and rear cross-path warning.

Warranty

There are over 59 percent more Mercedes dealers than there are Lexus dealers, which makes it much easier should you ever need service under the E-Class Wagon’s warranty.

Engine

The E-Class Wagon’s 3.0 turbo V6 produces 67 more horsepower (362 vs. 295) and 101 lbs.-ft. more torque (369 vs. 268) than the RX 350’s standard 3.5 DOHC V6. The E-Class Wagon’s 3.0 turbo V6 produces 54 more horsepower (362 vs. 308) than the RX 450h’s standard 3.5 DOHC V6 hybrid.

Fuel Economy and Range

The E-Class Wagon has 3.9 gallons more fuel capacity than the RX Series Hybrid’s standard fuel tank (21.1 vs. 17.2 gallons), for longer range between fill-ups. The E-Class Wagon has 1.9 gallons more fuel capacity than the RX Series’ standard fuel tank (21.1 vs. 19.2 gallons).

Transmission

A nine-speed automatic is standard on the Mercedes E-Class Wagon, for better acceleration and lower engine speed on the highway. Only an eight-speed automatic is available for the RX Series.

Brakes and Stopping

For better stopping power the E-Class Wagon’s brake rotors are larger than those on the RX Series:

 

E-Class

RX Series

Front Rotors

14.2 inches

12.9 inches

Rear Rotors

14.2 inches

13.3 inches

The E-Class Wagon stops much shorter than the RX Series:

 

E-Class

RX Series

 

60 to 0 MPH

108 feet

123 feet

Motor Trend

Tires and Wheels

For better traction, the E-Class Wagon has larger standard tires than the RX Series (245/45R18 vs. 235/65R18). The E-Class Wagon’s optional tires are larger than the largest tires available on the RX Series (F:245/45R18 & R:275/40R18 vs. 235/65R18).

The E-Class Wagon’s standard tires provide better handling because they have a lower 45 series profile (height to width ratio) that provides a stiffer sidewall than the RX Series’ standard 65 series tires. The E-Class Wagon’s optional tires have a lower 40 series profile than the RX Series’ optional 55 series tires.

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard on the E-Class Wagon can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The RX Series doesn’t offer run-flat tires.

Suspension and Handling

The rear suspension of the E-Class Wagon uses air springs for a smoother, controlled ride than the RX Series, which uses coil springs. Air springs maintain proper ride height and ride more smoothly.

The E-Class Wagon has a standard automatic front and rear load leveling suspension to keep ride height level with a heavy load or when towing. The E-Class Wagon’s 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 RX Series doesn’t offer a load leveling suspension.

The E-Class Wagon’s 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 RX Series doesn’t offer drift compensation steering.

For a smoother ride and more stable handling, the E-Class Wagon’s wheelbase is 5.9 inches longer than on the RX Series (115.7 inches vs. 109.8 inches).

The E-Class Wagon’s front to rear weight distribution is more even (51.7% to 48.3%) than the RX Series’ (57% to 43%). This gives the E-Class Wagon more stable handling and braking.

The E 400 4MATIC Wagon handles at .90 G’s, while the RX 450h AWD pulls only .78 G’s of cornering force in a Motor Trend skidpad test.

The E 400 4MATIC Wagon executes Motor Trend’s “Figure Eight” maneuver 1.8 seconds quicker than the RX 450h AWD (25.7 seconds @ .73 average G’s vs. 27.5 seconds @ .65 average G’s).

Chassis

The E-Class Wagon is 10 inches shorter in height than the RX Series, making the E-Class Wagon much easier to wash and garage and drive (lower center of gravity).

Passenger Space

The E-Class Wagon has standard seating for 7 passengers; the RX Series can only carry 5.

Cargo Capacity

The E-Class Wagon’s cargo area provides more volume than the RX Series.

 

E-Class

RX Series

Third Seat Folded

24.5 cubic feet

n/a

Third Seat Removed

35 cubic feet

18.4 cubic feet

Second Seat Folded

64 cubic feet

56.3 cubic feet

Servicing Ease

The engine in the E-Class Wagon is mounted longitudinally (North-South), instead of sideways, as in the RX Series. This makes it easier to service and maintain, because there are no rear spark plugs and the accessory belts are in front.

Ergonomics

Unlike the driver-only memory system optional at extra cost in the RX Series, the E-Class Wagon 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.

Heated windshield washer fluid is standard on the E-Class Wagon to defrost the washer nozzles and quickly clear ice and frost from the windshield without scraping. The RX Series doesn’t offer heated windshield washer fluid.

The E-Class Wagon’s optional Active Parking Assist can parallel park or back into a parking spot by itself, with the driver only controlling speed with the brake pedal. The RX Series doesn’t offer an automated parking system.

Model Availability

The Mercedes E-Class comes in coupe, convertible, sedan and station wagon bodystyles; the Lexus RX Series isn’t available as a coupe, convertible or sedan.

Economic Advantages

According to The Car Book by Jack Gillis, the E-Class Wagon is less expensive to operate than the RX Series because typical repairs cost much less on the E-Class Wagon than the RX Series, including $361 less for a water pump, $38 less for front brake pads, $849 less for a timing belt/chain and $1067 less for a power steering pump.

© 1991-2018 Advanta-STAR Automotive Research. All rights reserved.

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