Compare the2024 BMW 3 Series SedanVS 2023 Mercedes E-Class Sedan

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 3 Series Sedan 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.

The BMW 3 Series Sedan 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 E-Class Sedan doesn’t offer a front passenger side knee airbag.

Both the 3 Series Sedan 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, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, driver alert monitors, available all wheel drive, lane departure warning systems, blind spot warning systems, around view monitors 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 BMW 3 Series Sedan is safer than the Mercedes E-Class Sedan:

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 flat barrier at 38.5 MPH and into a post at 20 MPH, results indicate that the BMW 3 Series Sedan is safer than the Mercedes E-Class Sedan:

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

The 3 Series Sedan’s corrosion warranty is 7 years longer than the E-Class Sedan’s (12 vs. 5 years).

BMW pays for scheduled maintenance on the 3 Series Sedan for 3 years and 36,000 miles. BMW 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 E-Class Sedan.

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 3 Series Sedan’s reliability 51 points higher than the E-Class Sedan.

J.D. Power and Associates’ 2023 Initial Quality Study of new car owners surveyed provide the statistics that show that BMW vehicles are better in initial quality than Mercedes vehicles. With 9 fewer problems per 100 vehicles, JD Power ranks BMW higher than Mercedes.

J.D. Power and Associates’ 2022 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that BMW vehicles are more reliable than Mercedes vehicles. J.D. Power ranks BMW above average in long-term dependability. With 5 more problems per 100 vehicles in the first three years of ownership, Mercedes is rated below average.

From surveys of all its subscribers, Consumer Reports’ January 2023 Auto Issue reports that BMW vehicles are more reliable than Mercedes vehicles. Consumer Reports ranks BMW third in overall reliability. Mercedes is ranked 24th.

The 330i’s standard 2.0 turbo 4-cylinder produces 22 lbs.-ft. more torque (295 vs. 273) than the E 350 Sedan’s standard 2.0 turbo 4-cylinder. The M340i’s standard 3.0 turbo 6-cylinder hybrid produces 20 more horsepower (382 vs. 362) than the E 450 4MATIC Sedan’s standard 3.0 turbo 6-cylinder hybrid.

As tested in Car and Driver the M340i 3.0 turbo 6-cylinder hybrid is faster than the E 450 4MATIC Sedan 3.0 turbo 6-cylinder hybrid:

On the EPA test cycle the 3 Series Sedan gets better mileage than the E-Class Sedan:

Regardless of its engine, regenerative brakes improve the 3 Series Sedan’s fuel efficiency by converting inertia back into energy instead of wasting it. Mercedes only offers a regenerative brake system on the E-Class Sedan 450.

The 3 Series Sedan’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 E-Class Sedan doesn’t offer launch control.

For better stopping power the 3 Series Sedan’s standard brake rotors are larger than those on the E-Class Sedan:

The 3 Series Sedan stops much shorter than the E-Class Sedan:

The 3 Series Sedan’s optional 255/35R19 rear tires provide better handling because they have a lower 35 series profile (height to width ratio) that provides a stiffer sidewall than the E 350 Sedan’s optional 40 series tires.

The 3 Series Sedan offers an optional 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.

The 330i handles at .99 G’s, while the E 450 4MATIC Sedan pulls only .84 G’s of cornering force in a Car and Driver skidpad test.

The M340i executes Motor Trend’s “Figure Eight” maneuver 1.2 seconds quicker than the E 450 4MATIC Sedan (25 seconds @ .77 average G’s vs. 26.2 seconds @ .69 average G’s).

The BMW 3 Series Sedan may be more efficient, handle and accelerate better because it weighs about 250 pounds less than the Mercedes E-Class Sedan.

The 3 Series Sedan is 8.4 inches shorter than the E-Class Sedan, making the 3 Series Sedan easier to handle, maneuver and park in tight spaces.

The front grille of the 3 Series Sedan 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.

As tested by Car and Driver while at idle, the interior of the 330i is quieter than the E 450 4MATIC Sedan (38 vs. 40 dB).

The 3 Series Sedan has 1.4 inches more front headroom and .3 inches more front legroom than the E-Class Sedan.

Pulling a handle automatically lowers the 3 Series Sedan’s rear seats, to make changing between passengers and cargo easier. The E-Class Sedan doesn’t offer automatic folding seats.

J.D. Power and Associates surveys of service recipients show that BMW service is better than Mercedes. J.D. Power ranks BMW 7th in service department satisfaction (above the industry average). With a 17% lower rating, Mercedes is ranked 18th.

Consumer Reports rated the 3 Series Sedan’s headlight performance “Fair,” a higher rating than the E-Class Sedan’s headlights, which were rated “Poor.”

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the BMW 3 Series has a standard wireless phone charging system (Qi) in the center console. Wireless charging costs extra on the E-Class Sedan.

Insurance will cost less for the 3 Series Sedan owner. The Car Book by Jack Gillis rates the 3 Series Sedan with a number “3” insurance rate while the E-Class Sedan is rated higher at a number “5” rate.

According to The Car Book by Jack Gillis, the 3 Series Sedan is less expensive to operate than the E-Class Sedan because it costs $73 less to do the manufacturer’s suggested maintenance for 50,000 miles. Typical repairs cost much less on the 3 Series Sedan than the E-Class Sedan, including $7 less for a water pump, $243 less for a muffler, $228 less for a starter, $22 less for fuel injection, $221 less for a fuel pump and $310 less for a power steering pump.

Consumer Reports® recommends the BMW 3 Series Sedan, based on reliability, safety and performance. The Mercedes E-Class Sedan isn't recommended.

The BMW 3 Series outsold the Mercedes E-Class/CLS by 62% during 2022.