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2014 Audi A7 TDI combines high-tech power, diesel efficiency (pictures)

For the 2014 model year, Audi pours its 3-liter diesel engine into the high-tech A7, giving it average fuel economy around 30 mpg.

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Wayne Cunningham
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1 of 24 Josh Miller/CNET
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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