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Both the A4 Allroad and E-Class Wagon have child safety locks to prevent children from opening the rear doors. The A4 Allroad has power child safety locks, allowing the driver to activate and deactivate them from the driver's seat and to know when they're engaged. The E-Class Wagon’s child locks have to be individually engaged at each rear door with a manual switch. The driver can’t know the status of the locks without opening the doors and checking them.
The A4 Allroad has a standard Audi Backguard System, which use a specially designed headrest to protect the driver and front passenger from whiplash. During a rear-end collision, the Audi Backguard System moves the headrests forward to prevent neck and spine injuries. At the same time the pretensioning seatbelts fire, removing slack from the belts. The E-Class Wagon doesn’t offer a whiplash protection system.
The A4 Allroad has a standard Secondary Collision Brake Assist, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The E-Class Wagon 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.
When descending a steep, off-road slope, the A4 Allroad’s standard Hill Descent Control allows you to creep down safely. The E-Class Wagon doesn’t offer Hill Descent Control.
Both the A4 Allroad and the E-Class Wagon have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front and rear seatbelt pretensioners, height adjustable front shoulder belts, four-wheel antilock brakes, all wheel drive, 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.
For its top level performance in all IIHS frontal, side, rear impact and roof-crush tests, and its standard front crash prevention system, the Insurance Institute for Highway Safety grants the A4 Allroad the rating of “Top Pick” for 2017, a rating granted to only 184 vehicles tested by the IIHS. The E-Class Wagon has not been tested, yet.
The A4 Allroad’s corrosion warranty is 7 years longer than the E-Class Wagon’s (12 vs. 5 years).
The Audi A4 Allroad’s engine uses a cast iron block for durability, while the E-Class Wagon’s engine uses an aluminum block. Aluminum engine blocks are much more prone to warp and crack at high temperatures than cast iron.
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 A4 Allroad’s reliability 37 points higher than the E-Class Wagon.
J.D. Power and Associates’ 2019 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Audi vehicles are more reliable than Mercedes vehicles. J.D. Power ranks Audi 8th in reliability, above the industry average. With 10 more problems per 100 vehicles, Mercedes is ranked 13th.
From surveys of all its subscribers, Consumer Reports’ December 2019 Auto Issue reports that Audi vehicles are more reliable than Mercedes vehicles. Consumer Reports ranks Audi 7 places higher in reliability than Mercedes.
On the EPA test cycle the A4 Allroad gets better fuel mileage than the E 450 4MATIC Wagon (23 city/31 hwy vs. 19 city/26 hwy).
To lower fuel costs and make buying fuel easier, the Audi A4 Allroad uses regular unleaded gasoline (premium recommended for maximum performance). The E-Class Wagon requires premium, which can cost 20 to 55 cents more per gallon.
The A4 Allroad offers a standard sequential manual gearbox (SMG). With no clutch pedal to worry about and a fully automatic mode, an SMG is much more efficient than a conventional automatic but just as easy to drive. The E-Class Wagon doesn’t offer an SMG or a conventional manual transmission.
The A4 Allroad’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 Wagon doesn’t offer launch control.
The A4 Allroad stops much shorter than the E-Class Wagon:
70 to 0 MPH
Car and Driver
The A4 Allroad 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 Wagon; 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.
For better maneuverability, the A4 Allroad’s turning circle is .6 feet tighter than the E-Class Wagon’s (38.4 feet vs. 39 feet).
The Audi A4 Allroad may be more efficient, handle and accelerate better because it weighs about 500 pounds less than the Mercedes E-Class Wagon.
The A4 Allroad is 6.7 inches shorter than the E-Class Wagon, making the A4 Allroad easier to handle, maneuver and park in tight spaces.
The A4 Allroad’s power parking brake sets with one touch and releases with one touch or automatically. The E-Class Wagon’s parking brake has to released manually.
In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The A4 Allroad Prestige has standard headlight washers to keep headlight output high. The E-Class Wagon doesn’t offer headlight washers.
The A4 Allroad has standard heated front seats. Heated front seats cost extra on the E-Class Wagon. The A4 Allroad Premium Plus/Prestige also offers optional heated rear seats to keep those passengers extremely comfortable in the winter. Heated second row seats aren’t available in the E-Class Wagon.
Insurance will cost less for the A4 Allroad owner. The Complete Car Cost Guide estimates that insurance for the A4 Allroad will cost $3175 to $3625 less than the E-Class Wagon over a five-year period.
IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Audi A4 Allroad will be $11580 to $17690 less than for the Mercedes E-Class Wagon.
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