| Model Year | 2006 | 2014 | 2014 | 2014 |
| Model | RL | A8 / S8 | A8 / S8 | A8 / S8 |
| Trim | Base | A8 3.0T | A8 4.0T | S8 |
| Body | 4dr Sedan | 4dr Sedan | 4dr Sedan | 4dr Sedan |
| | | | |
| Transmission and Drivetrain | |
| 5-speed manually-shiftable automatic | $1000 | | | |
| 8-speed manually-shiftable automatic | | $1300 | $1300 | $1300 |
| AWD | $1700 | $1700 | $1700 | $1700 |
| Accessories | |
| Active noise reduction | $0 | | $0 | $0 |
| Hands-free trunk or liftgate | | $100 | $100 | $100 |
| Power door closers | | $300 | $300 | $300 |
| Power trunk closer | | $350 | $350 | $350 |
| Sunshades, second row | $125 | | | |
| Sunshades, second row, power | | $225 | $225 | $225 |
| Brakes, Airbags, and Other Safety | |
| Active or whiplash-reducing head restraints, front seats | | $0 | $0 | $0 |
| Around view cameras | | | | $500 |
| Blind spot warning system | | | | $200 |
| Brake- or yaw-sensor-initiated collision preparation system | | $0 | $0 | $0 |
| Collision preparation system, rear | | | | $100 |
| Knee airbag, driver | | $75 | $75 | $75 |
| Knee airbag, passenger | | $75 | $75 | $75 |
| Obstacle detection, front | | $150 | $150 | $150 |
| Obstacle detection, rear | | $250 | $250 | $250 |
| Rear side airbags | | $300 | $300 | $300 |
| Rearview camera | | $200 | $200 | |
| Rollover sensor | | $50 | $50 | $50 |
| Wide-view front camera | | | | $150 |
| Wide-view rear camera | | | | $0 |
| Cargo Management | |
| Air-conditioned storage compartment | | $50 | $50 | $50 |
| Cargo net | $40 | | | |
| Rear seat pass-through | $100 | | | |
| Climate Control | |
| Heated windshield washer nozzles | | $15 | $15 | $15 |
| Rain-sensing wipers | | $175 | $175 | $175 |
| Rear air vents | $100 | | | |
| Rear air vents with automatic controls | | $250 | $250 | $250 |
| Rear dual-zone climate control | | $125 | $125 | $125 |
| Residual heat | | $50 | $50 | $50 |
| Variable intermittent wipers | $75 | | | |
| Drivetrain | |
| Active rear differential | $500 | | | |
| Engine / Motor | |
| Dual-mode exhaust, switchable | | | | $500 |
| Exterior | |
| Body kit | | | | $0 |
| Bodyside moldings | $75 | | | |
| Laminated front side windows | | | | $200 |
| Laminated rear side windows | | | | $100 |
| Infotainment | |
| Aux input | | $50 | $50 | $50 |
| Bluetooth audio streaming | | $25 | $25 | $25 |
| CD changer, in-dash | $325 | | | |
| CD player | | $125 | $125 | $125 |
| DVD-compatible player | | $0 | $0 | $0 |
| Handwriting recognition | | $200 | $200 | $200 |
| HD radio | | $50 | $50 | $50 |
| In-vehicle Internet | | $150 | $150 | $150 |
| Media drive | | $15 | $15 | $15 |
| MP3-compatible player | | $50 | $50 | $50 |
| Telematics service, such as OnStar | $200 | | | |
| Traffic + travel information | | $25 | $25 | $25 |
| Traffic information | $25 | | | |
| Wi-Fi hotspot | | $50 | $50 | $50 |
| Instruments, Lights, and Mirrors | |
| Analog clock | | $25 | $25 | $25 |
| Auto-dimming driver-side mirror | | $75 | $75 | $75 |
| Auto-dimming headlights | | | | $200 |
| Auto-dimming passenger-side mirror | | $75 | $75 | $75 |
| Cornering lights | | $50 | $50 | $50 |
| Fog light, rear | | $100 | $100 | $100 |
| Headlight washers | | $50 | $50 | $50 |
| LED headlights | | | | $1000 |
| Power-folding mirrors | | $50 | $50 | $50 |
| Xenon HID headlights | $500 | $500 | $500 | |
| Seats and Interior Trim | |
| Cooled or ventilated front seats | | | | $300 |
| Massage, driver seat | | | | $100 |
| Massage, passenger seat | | | | $100 |
| Memory system, passenger seat | | $150 | $150 | $150 |
| Power 4-way lumbar adjuster, driver seat | | $150 | $150 | $150 |
| Power 4-way lumbar adjuster, passenger seat | | $150 | $150 | $150 |
| Power headrest height adjuster, driver seat | | $50 | $50 | $50 |
| Power headrest height adjuster, passenger seat | | $50 | $50 | $50 |
| Power height adjuster, passenger seat | | $100 | $100 | $100 |
| Power lumbar adjuster, driver seat | $100 | | | |
| Power lumbar adjuster, passenger seat | $100 | | | |
| Power seat belt height adjusters, front row | | $25 | $25 | $25 |
| Power seatback bolsters, driver seat | | | | $100 |
| Power seatback bolsters, passenger seat | | | | $100 |
| Power thigh bolsters, driver seat | | | | $100 |
| Power thigh bolsters, passenger seat | | | | $100 |
| Power thigh support length adjuster, driver seat | | $100 | $100 | $100 |
| Power thigh support length adjuster, passenger seat | | $100 | $100 | $100 |
| Power tilt adjuster, passenger seat | | $100 | $100 | $100 |
| Power upper seatback recliner, driver seat | | $100 | $100 | $100 |
| Power upper seatback recliner, passenger seat | | $100 | $100 | $100 |
| Power-folding headrests, second row seats | $50 | | | |
| Upholstered instrument panel | | $300 | $300 | $300 |
| Suspension, Wheels, and Tires | |
| Active steering | | | | $1000 |
| Adaptive dampers - electrical | | $500 | $500 | $500 |
| Air suspension, auto-leveling and height adjustable | | $1000 | $1000 | $1000 |
| Electronic systems calibration selector | | $200 | $200 | $200 |
| Total Value of Features | $5,015 | $10,580 | $10,580 | $14,730 |
| Value of Feature Adjustments | $0 | $5,565 | $5,565 | $9,715 |
| Value of Feature Adjustments | 0 | -5,180 | -5,180 | -9,040 |