

Model Year | 2007 | 2007 | 2007 | 2018 | 2018 | 2018 |
Model | A6 / S6 | A6 / S6 | A6 / S6 | Model X | Model X | Model X |
Trim | A6 3.2 | A6 4.2 | S6 | 75D | 100D | P100D |
Engines | ||||||
Transmissions | ||||||
Drivetrains | ||||||
Tires | ||||||
Audio Systems | ||||||
Accessories | ||||||
Automatically maintains set distance behind preceding vehicle as well as set speed. Minimum speed around 30 mph. Replaces regular cruise control, and includes its value. | ||||||
Automatically maintains speed based on preceding car and speed limit signs. Can bring vehicle to a complete stop then accelerate back up to set speed. Replaces regular adaptive cruise control, and includes its value. | ||||||
Change lanes by tapping turn signal. | ||||||
Car enters and exits parking spaces and garages without a driver in the car. Controlled by key fob or remote app. | ||||||
Tell the car where to go and it does the rest. Subject to future system validation and regulatory approval. | ||||||
Release latch by waving a foot beneath the bumper or a hand near a sensor. | ||||||
The car autonomously searches for a parking spot before parking itself. Subject to future system validation and regulatory approval. | ||||||
The front doors open by sensing location and path of the key-holder. Close and latch when the brake is depressed. Programmable. | ||||||
Often must be ordered with power rear side windows, if these are available. | ||||||
Rear doors open upward. Both can be opened and closed using buttons inside the vehicle and on the keyfob. Sensors detect obstacles. | ||||||
Liftgate can be opened and closed using buttons inside the vehicle and on the keyfob. | ||||||
Enter and start the vehicle without removing the key from your pocket. | ||||||
Check on car and remotely control various functions (remote start, locks, lights, and/or HVAC) from a telephone or computer. Can require a monthly fee. | ||||||
Unlock and lock the car using buttons on the keyfob. | ||||||
Automatically steers the vehicle into a parking space. Driver operates the transmission, and sometimes also the brake and accelerator. | ||||||
The car steers itself with no requirement that the driver keep a hand on the steering wheel. Can require that the driver take over at any time. | ||||||
Greatly reduces the amount of sunlight entering the rear window. Includes the value of manual rear shade. | ||||||
Greatly reduce the amount of sunlight entering the rear side windows. Retract into rear doors. | ||||||
Homelink. | ||||||
Brakes, Airbags, and Other Safety | ||||||
Rear disc brakes. | ||||||
If active, automatically move forward when the vehicle is rear-ended. Note: becoming less common. | ||||||
Only listed when pricing a single model because insufficient data for all cars. | ||||||
Automatically pulse the brakes in hard stops to prevent wheels from locking up, making it possible to brake and steer at the same time. | ||||||
If collision detection system senses imminent collision, applies moderate braking. | ||||||
When a panic stop is sensed, fully applies the brakes. | ||||||
Alerts driver when approaching the preceding car too quickly. | ||||||
Mandatory, in all cars. | ||||||
Alerts driver when the vehicle seems to be wandering out of the lane. | ||||||
Beeps signal distance to object in front of vehicle. Parking aid. | ||||||
Beeps signal distance to object behind vehicle. Parking aid. | ||||||
Torso-level second row airbags, usually contained in the rear door. Some also protect the head, but not as well as side curtain airbags. | ||||||
Rearview camera connected to display screen on the instrument panel. Often requires navigation system. | ||||||
Deploys extended duration side curtain airbags when the vehicle rolls over. Usually included on tall vehicles. Rare on others. | ||||||
Airbags contained just above the window level. Except in cars without a rear seat usually cover first and second row. | ||||||
Selectively applies the brakes to prevent excessive understeer or oversteer (spinning). | ||||||
Two types: a warning light when a tire is low on air and a pressure readout for each tire. | ||||||
When a drive wheel slips, it is braked and/or engine power is reduced, restoring traction. | ||||||
Automatically applies a front brake to counteract sway induced by a trailer. | ||||||
Cargo Management | ||||||
Hitch rated for up to 5,000 pounds. Capacity of the vehicle could be lower. | ||||||
Usually concealed behind a stowed armrest. Enables long items like skis to be carried without folding the rear seat. | ||||||
Second-row center console that rises to armrest height, and usually includes storage. | ||||||
Sack attached to rear seat pass-through. Keeps dirty skis from messing up the interior. | ||||||
Large storage area beneath the load floor, often compartmentalized. | ||||||
Includes seven-wire harness, necessary for larger trailers. | ||||||
Climate Control | ||||||
Maintains set temperature in front row. Requires air conditioning and does not include its value. | ||||||
Temperature can be separately set for left and right sides of the passenger compartment. Requires air conditioning and does not include its value. | ||||||
Highly effective interior air filter. | ||||||
Filters exterior air before it enters the passenger compartment. No default value because most cars have them, even in cases where they're not in the official list of features. | ||||||
Wipers automatically turn on and adjust their speed based on input from a rain sensor. | ||||||
Vents at aft end of center console, in B-pillars, and/or in ceiling. | ||||||
Maintains set temperature in rear passenger area by providing heated or cooled air through vents in the center console, B-pillars, and/or ceiling. Replaces and includes value of rear air vents with manual controls. | ||||||
Ducts under front seats direct heated air to the second row. | ||||||
A second evaporator provides cool air to rear vents. Does not include the value of these vents. Includes rear heater. | ||||||
Provides heat for an extended period of time after the engine has been cut off. | ||||||
Heating elements defrost area where front wipers rest. | ||||||
Engine / Motor | ||||||
Triple level charger, fastest charge times with 220V source. | ||||||
Only included if California/Northeast emissions equipment costs extra. | ||||||
Allows for quick charging to 80 percent capacity at 440V charging stations. Using such chargers frequently might degrade the battery. | ||||||
Increases charge rate when using an upgraded at-home charger. | ||||||
Only listed if not standard on all trims. No value because no way to compare across models. | ||||||
Exterior | ||||||
Protective cladding extending partly onto the doors. | ||||||
Protective cladding extending partly onto the doors. | ||||||
Moldings on the bodysides, to protect against door dings in parking lots. | ||||||
Increasingly often these are not actually connected to the exhaust. | ||||||
One or more glass panels in the roof that cannot be opened or removed. | ||||||
The windshield extends over the driver's head, for an especially open view forward. | ||||||
Spoiler extends automatically at high speeds. Otherwise flush with body. Can be manually extended and retracted. | ||||||
Solar cells power fans that help keep the car's interior cool when it is parked. With electric vehicles also provide a negligible amount of energy for running the car. | ||||||
Only listed if not standard on all trims. No value because no way to compare across models. | ||||||
Extensions to the wheel opening, both decorative and protective. | ||||||
Gas Guzzler Tax | ||||||
Infotainment | ||||||
Higher speed Internet connection. Monthly fee after trial period. | ||||||
Touchscreen and/or voice control over apps that can include online search, Facebook, Twitter, Pandora, OpenTable, and MovieTickets.com. Requires connected compatible phone. Fees may apply after first three years. | ||||||
Uses Bluetooth rather than a cable to integrate audio device. Requires compatible audio device and/or phone. | ||||||
Enables hands-free communication by wirelessly connecting a cell phone to a microphone and the vehicle's stereo speakers. | ||||||
CD changer in the glove compartment, trunk, or cargo area, beyond easy reach. Can be in addition to an in-dash CD player. | ||||||
High-definition radio, which broadcasts a digital signal. Free, no subscription fees. | ||||||
Connects car to the Internet to update systems, download information, and/or browse. Includes internal modem, usually requires car-specific broadband service with monthly fee. | ||||||
Audio system capable of playing discs with MP3 files. | ||||||
Screen-based navigation system. | ||||||
Alerts driver when the car is moving out of range of any quick charging station. | ||||||
XM or Sirius. Includes a subscription for three to six months, after which monthly fees apply. | ||||||
Often permits an iPod or phone to be integrated into the vehicle's entertainment system and controls. | ||||||
Sometimes also includes voice control over climate control system. | ||||||
Instruments, Lights, and Mirrors | ||||||
Driver-side exterior mirror automatically dims when hit by headlights of following vehicle. | ||||||
High beams automatically turned on and off. | ||||||
Passenger-side rearview mirror automatically dims when hit by headlights of following vehicle. | ||||||
Interior rearview mirror automatically dims when hit by headlights of following vehicle. | ||||||
Headlights automatically turn on and off. Includes value of automatic-off headlights. | ||||||
We haven't given this feature a value because it's hard to tell which cars have it. | ||||||
Lights illuminate area just ahead and to the side of the vehicle when the turn signals are used or the steering wheel is turned. | ||||||
Make it easier for following vehicles to see the vehicle in fog. | ||||||
Light wide area close in front of the vehicle. | ||||||
Clears ice and fog from mirrors. | ||||||
Includes value of non-illuminated vanity mirror. | ||||||
Includes value of non-illuminated vanity mirror. | ||||||
LEDs cast a soft glow over and/or highlight parts of the interior. | ||||||
The information displayed by the instruments can be customized. Color display(s) of at least 20 square inches. | ||||||
Standard or optional in some hybrid vehicles. Fancy display of power flows, enhanced trip computer information. | ||||||
LED headlights last longer and use less energy than other types. | ||||||
Only listed if not standard on all trims. No value because no way to compare across models. | ||||||
Front row reading lights. | ||||||
One or both exterior mirrors tilt down when the transmission is in reverse, to provide view of the curb. | ||||||
Area around the vehicle is illuminated when the vehicle is remotely unlocked. | ||||||
Includes value of manual remote mirrors. | ||||||
Mirrors fold and unfold with the touch of a button inside the vehicle. Good for narrow roads and parking lots. | ||||||
Displays the current speed limit. Included with nav on an increasing number of cars. No feature value here because incomplete info on availability. | ||||||
Headlights swivel when steering wheel is turned. | ||||||
Reports engine speed. | ||||||
Reports average fuel economy, and perhaps also instantaneous fuel economy, distance to empty, average speed, and other stats. | ||||||
Provide a brighter, whiter light than halogen headlights. | ||||||
Seats and Interior Trim | ||||||
Won't be listed in conjunction with wood or aluminum trim even if they are available together. | ||||||
Seat folds to enlarge cargo area. Unless the seat is also removable, it usually folds flat or nearly flat. | ||||||
Seat folds to enlarge cargo area. Unless the seat is also removable, it usually folds flat or nearly flat. | ||||||
Seating surfaces are trimmed in leather; other upholstery tends to be leatherette. | ||||||
Manually adjustable cushion length; provides better support for long legs. | ||||||
Lower back support power-adjustable vertically as well as in and out. | ||||||
Lower back support power-adjustable vertically as well as in and out. | ||||||
Power tilting seat cushion; can take the form of a second height adjustment. | ||||||
Power tilting seat cushion; can take the form of a second height adjustment. | ||||||
Only listed if not standard on all trims. No value because no way to compare across models. | ||||||
A.k.a vinyl, leatherette, MB-Tex, NuLuxe. | ||||||
Usually also includes synthetic suede on the pillars. | ||||||
No additional value over leather upholstery because no way to standardize across all models. | ||||||
Real wood trim on instrument panel, door panels, and/or center console. | ||||||
Real wood comprises part of the steering wheel rim. | ||||||
Suspension, Wheels, and Tires | ||||||
Shocks that electrically adjust their firmness based on sensor readings of the road surface. The driver might also be able to select a \"sport\" setting. | ||||||
Air springs automatically level the vehicle and enable manual adjustment of ride height. | ||||||
Varies throttle, steering, ABS, and/or stability control calibration. | ||||||
Alloy wheels highly polished to yield an almost chrome-like finish. In the past valued more highly than regular alloy wheels. But the term is used so broadly lately, often meaning that only some of the wheel face is machined, that they have the same defau | ||||||
Only listed if not standard on all trims. No value because no way to compare across models. | ||||||
Lug nuts that can only be removed using a special key. Prevents theft of wheels. | ||||||
Transmission | ||||||
Paddles or buttons that can be used to manually shift the transmission. Only listed when optional or not always included with an automatic transmission. | ||||||
Only listed when pricing a single model because insufficient data for all cars. |
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