For the 2014 model year, Audi adds a diesel option to its excellent A7.

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The Quattro all-wheel-drive label peeks out from the grille. Quattro comes standard on the A7.

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Audi uses this turbocharged 3-liter V-6 diesel engine in a number of its newest models.

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The A7 TDI boasts an EPA-rated 29 mpg average fuel economy, excellent for a large vehicle.

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The hatchback design rakes the rear of the roofline down dramatically.

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The hatchback allows for 24.5 cubic feet of luggage space.

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This spoiler automatically rises when the car is at speed.

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Bang & Olufsen's acoustic lenses pop up from the corners of the dashboard, taking the place of traditional tweeters.

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The A7 includes a sensor array in front of the rearview mirror for its driver assistance features.

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The seats have some bolstering to help keep passengers in place when cornering.

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The middle position in the rear seat is not very comfortable.

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Satin-finish wood trim is a very nice touch in the cabin.

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The center LCD display motors out from the dashboard, hiding itself when the car is parked.

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Electrically boosted power steering is tuned for a light feel.

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Audi relies on traditional analog gauges in the instrument cluster, rather than going to an LCD panel.

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The shifter sits among Audi's MMI cabin tech controls.

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Audi uses an elliptical format for its home screen.

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Maps can be displayed in this traditional graphical format, or with Google Earth imagery.

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Audi's touch pad does a phenomenal job of accurately recognizing finger-traced letters.

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A variety of white-label information services rely on the car's data connection.

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Hooking up an iPhone 5 in the car requires Apple's Lightning adapter, which delivers atrocious audio quality.

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Drive Select allows a number of different driving profiles.

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Front cameras show corner views, useful when pulling out of a blind alley.

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The rearview camera shows trajectory lines.

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