Used 2015 Audi A6 Diesel

2015 Audi A6
List price range
2015 Audi A6


  • Finely finished interior with generous passenger space
  • strong supercharged and diesel V6 engines
  • impressive diesel fuel economy
  • top crash-test scores
  • sporty handling.


  • Firm ride
  • numb steering
  • one front-seat design fits all.

Used 2015 Audi A6 Diesel for Sale

Audi A6 2015 TDI Prestige quattro 4dr Sedan AWD (3.0L 6cyl Turbodiesel 8A)
17,774 miles
Used 2015
Audi A6
TDI Prestige quattro
Club Cars
20.2 mi away
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Dealer Notes
Audi A6 2015 TDI Prestige quattro 4dr Sedan AWD (3.0L 6cyl Turbodiesel 8A)
35,686 miles
Used 2015
Audi A6
TDI Prestige quattro
Audi Bethesda
21.3 mi away
ListNot Listed
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Dealer Notes
Audi A6 2015 TDI Premium Plus quattro 4dr Sedan AWD (3.0L 6cyl Turbodiesel 8A)
27,502 miles
Used 2015
Audi A6
TDI Premium Plus quattro
36.2 mi away
ListNot Listed
View Details

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Edmunds' Expert Review

The 2015 Audi A6 has excellent driving dynamics, a welcoming interior, masterful engines and technology aplenty. It's one of our favorite midsize luxury sedans.

vehicle overview

Luxury sedan shoppers have come to expect quite a bit from automakers, and not every model is up to the task. But the 2015 Audi A6 is good enough to satisfy almost anyone's expectations. A strong performer in every category, the A6 spoils drivers and passengers alike -- and looks good doing it. If you're fortunate enough to be shopping in this all-star segment, the A6 belongs at the top of your test-drive agenda.

What makes the A6 such an excellent choice? Credit Audi's exacting standards across the board. The engines deliver exemplary refinement and performance that feels stronger than the numbers suggest. We're particularly enamored of the diesel-fueled TDI model, which earned an Edmunds "A" rating thanks to its phenomenal blend of fuel economy and acceleration. Regardless of which A6 you choose, you'll enjoy a hushed and upscale environment on the inside, with ample space, exquisite materials and cutting-edge technology. And on the road, the A6 feels remarkably nimble and athletic.

Although the A6 is easily one of our favorites in this class, there's still some strong competition out there. The 2015 BMW 5 Series isn't as sporty, but its engines, features and build quality stack up very well. Much the same can be said of the 2015 Mercedes-Benz E-Class, though its four-cylinder diesel's power output trails the six-cylinder versions from Audi and BMW. The 2015 Cadillac CTS's distinctive style and sports-car handling make it a worthy alternative to the Germans, while the Lexus GS 350 and the hybrid-powered Lexus GS 450h deliver world-class driving dynamics and interior decor. For a midsize luxury sedan that's good at everything, though, it's hard to beat the 2015 Audi A6.

2015 Audi A6 configurations

The 2015 Audi A6 is a midsize luxury sedan essentially available in six trim levels -- 2.0T Premium, 2.0T Premium Plus, 3.0T Premium Plus, 3.0T Prestige, TDI Premium Plus and TDI Prestige. The 2.0T, 3.0T and TDI designations denote the engine fitted (a turbocharged 2.0-liter four-cylinder, a supercharged 3.0-liter V6 and a turbocharged 3.0-liter diesel V6, respectively). The high-performance S6 variant is reviewed separately.

Standard equipment for the 2.0T Premium includes 18-inch wheels, Audi Drive Select (providing adjustable modes for steering, gas pedal and transmission response), automatic xenon headlights, LED running lights and taillights, automatic wipers, auto-dimming mirrors, a sunroof, tri-zone automatic climate control, heated eight-way power front seats (includes four-way lumbar adjustments), driver memory settings, leather upholstery, Bluetooth phone connectivity, Audi's MMI electronics interface, a 6.5-inch display screen and a 10-speaker sound system with a CD player, satellite radio and an iPod interface. Also standard is Audi's Pre-Sense Basic safety system.

The 2.0T Premium Plus adds front and rear parking sensors, a rearview camera, a blind spot monitoring system, Pre-Sense Rear, power-folding exterior mirrors, keyless ignition and entry, an 8-inch display screen, a voice-activated navigation system, a rearview camera, HD radio, Bluetooth audio connectivity, an upgraded version of MMI with an enhanced controller and Audi Connect (featuring Google Earth integration, Google-powered search functions, smartphone app integration and WiFi hotspot capability).

The 3.0T Premium Plus is equipped similarly to the 2.0T Premium Plus but adds "S line" exterior enhancements and a fuel-saving engine stop-start system.

Going with the 3.0T Prestige gets you adaptive LED headlights, ambient LED cabin lighting, a head-up display, ventilated front seats, a power-adjustable steering wheel, a 14-speaker Bose audio system and the Warm Weather package (including four-zone climate control, a power rear sunshade and manual rear side-window sunshades).

The TDI Premium Plus is equipped similarly to the 3.0T Premium Plus, while the TDI Prestige has the same equipment as the 3.0T Prestige.

Optional packages, depending on trim, include the Warm Weather package (see above), the Cold Weather package (heated rear seats and a heated steering wheel), the Sport package (19- or 20-inch wheels, a sport-tuned suspension and a three-spoke sport steering wheel with shift paddles), the Driver Assistance package (adaptive cruise control, a top-view camera system with front and rear corner views, lane-keeping assist and Pre-Sense Plus collision mitigation with automatic braking) and the Black Optic package (high-gloss black trim and unique 20-inch wheels with summer tires).

Some of the higher trims' standard features are optional on lower trims, such as the Prestige's Bose audio system and LED headlights. Other notable options include rear side airbags and two items that are limited to the Prestige: a night vision camera system with pedestrian detection and a 15-speaker Bang & Olufsen audio system.

2015 Highlights

The 2015 Audi A6 receives only minor equipment adjustments, including standard 18-inch wheels and xenon headlights for the base 2.0T Premium, and a head-up display and full LED headlights for all Prestige trims.

Performance & mpg

The 2015 Audi A6 2.0T is powered by a turbocharged 2.0-liter four-cylinder engine good for 220 horsepower and 258 pound-feet of torque. Front-wheel drive and a continuously variable automatic transmission (CVT) are standard, but you're more likely to encounter the all-wheel-drive version, which comes with an eight-speed conventional automatic. Audi estimates a 0-60-mph time of 7.4 seconds with the CVT and 6.6 seconds with the eight-speed. Fuel economy for the 2.0T is EPA rated at a laudable 28 mpg combined (25 city/33 highway) with the CVT, dropping to a rather pedestrian 23 mpg combined (20/29) with the eight-speed.

The Audi A6 3.0T gets a supercharged 3.0-liter V6 that produces 310 hp and 325 lb-ft of torque. The eight-speed automatic and all-wheel drive are standard, as is automatic engine stop-start technology. In Edmunds performance testing, the 3.0T sedan went from zero to 60 mph in 5.2 seconds, a quick time among midsize luxury sedans equipped with similarly powerful six-cylinder engines. Fuel economy stands at an estimated 22 mpg combined (18/27), just a tick behind the much less powerful 2.0T.

With the A6 TDI, you get the best of both worlds. The all-wheel-drive TDI's 3.0-liter turbodiesel V6 cranks out 240 hp and 428 lb-ft of torque, teaming up with the eight-speed auto. The combo was good enough to hit 60 mph in just 5.6 seconds in our testing. Yet fuel economy is a stellar 29 mpg combined (24/38), ranking right up there with frugal compact sedans. In an Edmunds test over 400 miles with varying driving conditions, we averaged 27.8 mpg.


Standard safety equipment on the 2015 Audi A6 includes antilock disc brakes, stability control, front-seat side airbags, front knee airbags and full-length side curtain airbags. Rear side airbags, a rearview camera, front and rear parking sensors, lane-keeping assist and a blind-spot warning system are optional.

The standard Audi Pre-Sense system can warn the driver, tension the seatbelts and close the windows if a potential collision is detected, while Pre-Sense Rear flashes the brake lights as a warning to rearward traffic if you're in danger of being rear-ended. The optional Pre-Sense Plus system (available via the Driver Assistance package) can do all that, plus fully tighten the seatbelts and automatically apply the brakes full force to mitigate crash damage from an impending frontal collision.

In Edmunds brake testing, an A6 3.0T with the Sport package's summer performance tires came to a stop from 60 mph in 111 feet, while an A6 TDI Sport with summer tires did it in 114 feet. These are average distances among comparably equipped midsize luxury sedans. Expect longer distances from A6s with all-season tires.

In government crash tests, the 2015 Audi A6 received five out of five stars overall, with five stars for frontal crash protection and five stars for side-impact protection. The independent Insurance Institute for Highway Safety gave the A6 its highest rating of "Good" in the moderate-overlap frontal-offset, side-impact and roof-strength tests, while the A6's seat and head restraint design was also rated "Good" for whiplash protection in rear impacts.


The 2015 Audi A6 is a fun car to drive, especially considering its size and heft. It changes directions eagerly, with plenty of grip from all four corners. Not many midsize luxury sedans forge such a gratifying connection with the driver. One demerit is overly light and numb steering under normal circumstances, but we've found that the effort tends to firm up as your enthusiasm increases.

The supercharged 3.0-liter V6 engine is responsive and pulls with effortless authority all the way to redline. The 2.0T doesn't sound quite as smooth, but it certainly feels stronger than the official 220-hp rating. The front-wheel-drive 2.0T Premium with its CVT is an oddball offering in this segment; although the CVT isn't bad for the breed, we much prefer the all-wheel-drive 2.0T Premium Plus with its confident conventional automatic, even though fuel economy suffers. Cost no object, the TDI is the pick of the litter, as it provides a mountain of torque and by far the best fuel economy.

Although the A6 has a composed ride that's never harsh, it's definitely firm, and there are sometimes more jolts than we'd like on rough pavement. For this reason, we recommend skipping the Sport package with its firmer suspension, especially if you're eyeing the 20-inch wheels. The regular A6 handles just fine, and it rides noticeably better with the standard 18s.


The 2015 Audi A6 has one of the best cabins in its class, with an attractive dash layout, excellent materials quality and solid fit and finish. The familiar MMI infotainment system controls a dizzying array of functions, utilizing a dash-mounted pop-up screen and a knob and buttons on the center console. The system boasts logical menus and crisp graphics, and the "MMI navigation plus" upgrade (standard on all except the base 2.0T Premium) includes a touchpad that can recognize fingertip scrawls. It's remarkably sophisticated, but we still prefer BMW's iDrive or Mercedes' COMAND for overall ease of use.

The upgraded MMI system also serves as a mobile 3G WiFi hotspot for up to eight devices, and it adds Google Earth data to the navigation system while providing a simplified Google search for POIs. The hotspot in particular is quite handy if you need to get some work done on the road and there's no Starbucks in sight. The Google Earth navigation system is more a matter of form over function, however, and can actually make the map more difficult to comprehend at a glance.

The A6's front seats are supportive and comfortable, remaining so even on long trips, though some may lament the absence of optional "super seats" like BMW's multicontour chairs. The spacious backseat offers more real-world legroom than most rivals. The A6's 14.1-cubic-foot trunk is slightly below average for the segment, but we've found it generous in real-world testing, and the rear seatbacks both fold and offer a pass-through when more space is needed.

Consumer reviews

Read what other owners think about the 2015 Audi A6.

Overall Consumer Rating

Most helpful consumer reviews

I love this thing every time I drive it
John Vetrano,02/23/2018
We've owned our diesel A6 for three years next month and love it. It was my daily driver for 2 1/2 years and my 35 minute commute (mostly curvy country back roads) was comfortable and the diesel had plenty of "umph" for passing. It has shift paddles but I never use them as the tranny seems to work fine and I still am not "in tune" with the characteristics of the diesel so I let the tranny do the shifting. I have taken it on three long road trips, each about 600 miles each way, and it is fantastic. Over 40 mpg at 70 mph with a nice stereo, awesomely comfortable seats, and an efficient cruise control (as an older base car it doesn't have adaptive cruise control). GPS is great and has voice control that works fine. We got the prestige with most of the bells and whistles (how did we live without heads up display??) The diesel-gate hit the fan a few months after we bought it but it never bothered me. We just had the fix done about a month ago and it seems to drive the same but mpg seems reduced a few percent. We already received our Audi settlement payment but not the Bosch one yet. Anyway, six months ago we sold my wife's SUF and bought a truck to pull a trailer so I've been driving the F150 and she's driving the Audi. I only drive it occasionally and today was such a day; I'm re-impressed with this car every time I drive it. I can't imagine that aside from size (and this has plenty of rear-seat and trunk room) an A8 can be any better. Thoughtful touches like the grocery bag hooks in the trunk are great. The interior (we got the open pore wood with a light tan leather) is still attractive and it is my first car with cooled seats, which are great in the summer (and for my hot-flashing wife!!). Anyway, can't say enough about it. Rockville Audi has been great (we had a BMW but the service at the local dealer was horrible). Last thing; I have managed to find what for me is the most perfect seating position in any car I've owned. I have a relatively short body compared to legs/arms but it is fully adjustable and the seat bottom tips back a bit to keep the thighs supported. Love it! We normally turn over cars about every three years but have decided to keep this for another three.
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Features & Specs

24 city / 38 hwy
Seats 5
8-speed shiftable automatic
240 hp @ 3500 rpm
24 city / 38 hwy
Seats 5
8-speed shiftable automatic
240 hp @ 3500 rpm
See all Used 2015 Audi A6 Diesel features & specs


NHTSA Overall Rating

The National Highway Transportation Safety Administration offers independent analysis.
  • Frontal Barrier Crash Rating
    Overall5 / 5
    Driver5 / 5
    Passenger5 / 5
  • Side Crash Rating
    Overall5 / 5
  • Side Barrier Rating
    Overall5 / 5
    Driver5 / 5
    Passenger5 / 5
  • Combined Side Barrier & Pole Ratings
    Front Seat5 / 5
    Back Seat5 / 5
  • Rollover
    Rollover5 / 5
    Dynamic Test ResultNo Tip
    Risk Of Rollover9%
IIHS Rating
The Insurance Institute of Highway Safety uses extensive crash tests to determine car safety.
  • Side Impact Test
  • Roof Strength Test
  • Rear Crash Protection / Head Restraint
  • IIHS Small Overlap Front Test
    Not Tested
  • Moderate Overlap Front Test

More about the 2015 Audi A6
Used 2015 Audi A6 Diesel Overview

The Used 2015 Audi A6 Diesel is offered in the following styles: TDI Premium Plus quattro 4dr Sedan AWD (3.0L 6cyl Turbodiesel 8A), and TDI Prestige quattro 4dr Sedan AWD (3.0L 6cyl Turbodiesel 8A).

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Should I lease or buy a 2015 Audi A6?

Is it better to lease or buy a car? Ask most people and they'll probably tell you that car buying is the way to go. And from a financial perspective, it's true, provided you're willing to make higher monthly payments, pay off the loan in full and keep the car for a few years. Leasing, on the other hand, can be a less expensive option on a month-to-month basis. It's also good if you're someone who likes to drive a new car every three years or so.

Check out Audi lease specials
Check out Audi A6 lease specials