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The E-Class Sedan’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The Panamera doesn’t offer pre-crash pretensioners.
The rear seatbelts optional on the E-Class Sedan 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 Panamera doesn’t offer inflatable seatbelts.
To help make backing safer, the E-Class Sedan’s optional cross-path warning system uses wide-angle radar in the rear bumper to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. The Panamera doesn’t offer a cross-path warning system.
The E-Class Sedan’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 Panamera doesn’t offer a driver alert monitor.
Both the E-Class Sedan and the Panamera 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, lane departure warning systems, blind spot warning systems and around view monitors.
For its top level performance in IIHS driver-side small overlap frontal, moderate overlap frontal, side impact, rear impact and roof-crush tests, its standard front crash prevention system, its “Good” rating in the new passenger-side small overlap crash test, and its headlight’s “Good” rating, the Insurance Institute for Highway Safety grants the E-Class Sedan its highest rating: “Top Pick Plus” for 2018, a rating granted to only 28 vehicles tested by the IIHS. The Panamera has not been tested, yet.
There are over 2 times as many Mercedes dealers as there are Porsche dealers, which makes it much easier should you ever need service under the E-Class Sedan’s warranty.
In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Mercedes E-Class Sedan higher (5 out of 10) than the Porsche Panamera (3 to 5). This means the E-Class Sedan produces up to 16.5 pounds less smog-producing pollutants than the Panamera every 15,000 miles.
A nine-speed automatic is standard on the Mercedes E-Class Sedan, for better acceleration and lower engine speed on the highway. Only an eight-speed automatic is available for the Panamera.
In an emergency stopping situation, many drivers don’t press the brakes with enough force to stop the vehicle in the shortest distance. The E-Class Sedan has a standard brake assist system to detect emergency braking situations (by how hard and how quickly the brake pedal is pressed) and then automatically apply maximum braking immediately in order to help prevent a collision. The Panamera doesn’t offer a brake assist feature.
The E-Class Sedan stops shorter than the Panamera:
70 to 0 MPH
Car and Driver
Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires available on the E-Class Sedan can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The Panamera doesn’t offer run-flat tires.
The E-Class Sedan’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 Panamera doesn’t offer drift compensation steering.
For better maneuverability, the E-Class Sedan’s turning circle is .8 feet tighter than the Panamera’s (38.2 feet vs. 39 feet). The E 450 4MATIC Sedan’s turning circle is 1.7 feet tighter than the Panamera Executive’s (39 feet vs. 40.7 feet).
The Mercedes E-Class Sedan may be more efficient, handle and accelerate better because it weighs about 200 to 950 pounds less than the Porsche Panamera.
The E-Class Sedan is 5 inches shorter than the Panamera, making the E-Class Sedan easier to handle, maneuver and park in tight spaces.
As tested by Car and Driver, the interior of the E 300 Sedan 4MATIC is quieter than the Panamera Turbo:
The E-Class Sedan has standard seating for 5 passengers; the Panamera can only carry 4.
A low lift-over trunk design makes loading and unloading the E-Class Sedan easier. The E-Class Sedan’s trunk lift-over height is 27.7 inches, while the Panamera’s liftover is 29.7 inches.
With its sedan body style, valet key, locking rear seatbacks and remote trunk release lockout, the E-Class offers cargo security. The Panamera’s hatchback body style and non-lockable remote release defeat cargo security.
The E-Class Sedan has a standard remote vehicle starting system, so the vehicle can be started from inside the driver's house. This allows the driver to comfortably warm up the engine before going out to the vehicle. The climate system will also automatically heat or cool the interior. The Panamera doesn’t offer a remote starting system.
The E-Class Sedan’s standard easy entry system raises the steering wheel, making it easier for the driver to get in and out. An easy entry system costs extra on the Panamera.
The E-Class Sedan offers an optional heads-up display that projects speed and navigation instruction readouts in front of the driver’s line of sight, allowing drivers to view information without diverting their eyes from the road. The Panamera doesn’t offer a heads-up display.
If the windows are left open on the E-Class Sedan the driver can close them all at the outside door handle or from a distance using the remote. On a hot day the driver can lower the windows from a distance using the keyless remote. The driver of the Panamera can only operate the windows from inside the vehicle, with the ignition on.
Heated windshield washer fluid is standard on the E-Class Sedan to defrost the washer nozzles and quickly clear ice and frost from the windshield without scraping. The Panamera doesn’t offer heated windshield washer fluid.
To better shield the driver and front passenger’s vision, the E-Class Sedan has standard dual-element sun visors that can block glare from two directions simultaneously. The Panamera doesn’t offer secondary sun visors.
To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the E-Class Sedan has standard extendable sun visors. The Panamera doesn’t offer extendable visors.
The E-Class Sedan offers an optional 115-volt a/c outlet on the center console, allowing you to recharge a laptop or run small household appliances without special adapters that can break or get misplaced. The Panamera doesn’t offer a house-current electrical outlet.
The E-Class Sedan’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 Panamera doesn’t offer an automated parking system.
The Mercedes E-Class comes in coupe, convertible, sedan and station wagon bodystyles; the Porsche Panamera isn’t available as a coupe or convertible.
Insurance will cost less for the E-Class Sedan owner. The Complete Car Cost Guide estimates that insurance for the E-Class Sedan will cost $1390 to $11690 less than the Panamera over a five-year period.
IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Mercedes E-Class Sedan will be $27031 to $86712 less than for the Porsche Panamera.
Consumer Reports® recommends the Mercedes E-Class Sedan, based on reliability, safety and performance.
The E-Class was chosen as one of Car and Driver’s “Top Ten” in 2018. The Panamera has never been a Car and Driver “Top Ten” pick.
The Mercedes E-Class outsold the Porsche Panamera by almost six to one during the 2018 model year.
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