2019 Buick LaCrosse vs. 2019 Mercedes E-Class Sedan

Detailed Review, Specifications & Comparison

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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 LaCrosse are reminded to check the back seat if they opened the rear door before starting out. The E-Class Sedan doesn’t offer a back seat reminder.

Both the LaCrosse and the E-Class Sedan have standard driver and passenger frontal airbags, front side-impact airbags, driver knee 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, daytime running lights, rearview cameras, available all wheel drive, crash mitigating brakes, lane departure warning systems, blind spot warning systems, front parking sensors and rear cross-path warning.

The National Highway Traffic Safety Administration does 35 MPH front crash tests on new vehicles. In this test, results indicate that the Buick LaCrosse is safer than the Mercedes E-Class Sedan:



E-Class Sedan




5 Stars

5 Stars

Neck Injury Risk



Neck Stress

212 lbs.

266 lbs.

Neck Compression

21 lbs.

55 lbs.

Leg Forces (l/r)

169/229 lbs.

402/578 lbs.

New test not comparable to pre-2011 test results. More stars = Better. Lower test results = Better.

The National Highway Traffic Safety Administration does side impact tests on new vehicles. In this test, which crashes the vehicle into a post at 20 MPH, results indicate that the Buick LaCrosse is safer than the Mercedes E-Class Sedan:



E-Class Sedan


Into Pole


5 Stars

5 Stars




Spine Acceleration

30 G’s

43 G’s

Hip Force

653 lbs.

836 lbs.

New test not comparable to pre-2011 test results. More stars = Better. Lower test results = Better.


Buick’s powertrain warranty covers the LaCrosse 2 years and 20,000 miles longer than Mercedes covers the E-Class Sedan. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 6 years or 70,000 miles. Coverage on the E-Class Sedan ends after only 4 years or 50,000 miles.

The LaCrosse’s corrosion warranty is 1 year longer than the E-Class Sedan’s (6 vs. 5 years).

Buick pays for the first scheduled maintenance on the LaCrosse. Buick will pay for the first oil change, lubrication and any other required maintenance in the first year. Mercedes doesn’t pay scheduled maintenance for the E-Class Sedan.

There are over 5 times as many Buick dealers as there are Mercedes dealers, which makes it much easier should you ever need service under the LaCrosse’s warranty.


The LaCrosse has a standard “limp home system” to keep drivers from being stranded if most or all of the engine’s coolant is lost. The engine will run on only half of its cylinders at a time, reduce its power and light a warning lamp on the dashboard so the driver can get to a service station for repairs. The E-Class Sedan doesn’t offer a lost coolant limp home mode, so a coolant leak could strand you or seriously damage the car’s engine.

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 LaCrosse’s reliability 12 points higher than the E-Class Sedan.

J.D. Power and Associates’ 2018 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Buick vehicles are more reliable than Mercedes vehicles. J.D. Power ranks Buick third in reliability, above the industry average. With 31 more problems per 100 vehicles, Mercedes is ranked 15th.


As tested in Car and Driver the Buick LaCrosse V6 is faster than the E 300 Sedan 2.0 turbo 4 cyl.:



E-Class Sedan

Zero to 60 MPH

5.9 sec

6.5 sec

Zero to 100 MPH

14.5 sec

17.7 sec

5 to 60 MPH Rolling Start

6.1 sec

7.3 sec

Quarter Mile

14.5 sec

15 sec

Speed in 1/4 Mile

100 MPH

92 MPH

Top Speed

149 MPH

129 MPH

Fuel Economy and Range

An engine control system that can shut down half of the engine’s cylinders helps improve the LaCrosse V6’s fuel efficiency. The E-Class Sedan doesn’t offer a system that can shut down part of the engine.

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

The LaCrosse has a standard cap-less fueling system. The fuel filler is automatically opened when the fuel nozzle is inserted and automatically closed when it’s removed. This eliminates the need to unscrew and replace the cap and it reduces fuel evaporation, which causes pollution. The E-Class Sedan doesn’t offer a cap-less fueling system.

Tires and Wheels

For better ride, handling and brake cooling the LaCrosse Essence/Premium/Avenir offers optional 20-inch wheels. The E-Class Sedan’s largest wheels are only 19-inches.

The LaCrosse V6 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 E-Class Sedan; 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 models of the E-Class Sedan don’t even offer run-flats.

Suspension and Handling

For better maneuverability, the LaCrosse’s turning circle is .2 feet tighter than the E-Class Sedan’s (38 feet vs. 38.2 feet). The LaCrosse’s turning circle is 1 foot tighter than the E 450 4MATIC Sedan’s (38 feet vs. 39 feet).


The Buick LaCrosse may be more efficient, handle and accelerate better because it weighs about 300 pounds less than the Mercedes E-Class Sedan.

The front grille of the LaCrosse uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The E-Class Sedan doesn’t offer active grille shutters.

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

As tested by Car and Driver while under full throttle, the interior of the LaCrosse Premium is quieter than the E 300 Sedan 4MATIC (75 vs. 76 dB).

Passenger Space

The LaCrosse has 4 cubic feet more passenger volume than the E-Class Sedan (102 vs. 98).

The LaCrosse has 1 inch more front headroom, .3 inches more front legroom and 1.8 inches more rear legroom than the E-Class Sedan.

Cargo Capacity

The LaCrosse has a much larger trunk than the E-Class Sedan (15 vs. 13.1 cubic feet).

Economic Advantages

Insurance will cost less for the LaCrosse owner. The Complete Car Cost Guide estimates that insurance for the LaCrosse will cost $600 to $5325 less than the E-Class Sedan over a five-year period.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Buick LaCrosse will be $22386 to $32412 less than for the Mercedes E-Class Sedan.

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

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