- A-PILLAR – A-Pillar
- AAS – Adaptive Air Suspension
- ABC – Active Body Control
- ABD – Automatic Braking Differential
- ABS – Antilock Braking System
- ACC – Adaptive Cruise Control
- ACC – Automatic Climate Control
- ACE – Active Cornering Enhancement
- ACE – Advanced Compatibility Engineering
- ACS – Attention Control System
- ACT – Active Suspension Technology
- ADC – Automatic Distance Control
- ADJUSTABLE HEIGHT SHOULDER BELT – Adjustable height shoulder belt
- ADS – Adaptive Damping System
- AERODYNAMICS – Aerodynamics
- AFS – Active Front-lighting System
- AIRBAG – Airbag
- Airbag ECU – Airbag Electronic Control Unit
- AIRMATIC – Airmatic
- ALD – Automatic Locking Differential
- ALR – Automatic Locking Retractors
- AMG – Aufrecht Melcher Grossaspach
- ANC – Active Noise Cancellation
- ANGLE OF APPROACH – Angle of Approach
- ANGLE OF DEPARTURE – Angle of Departure
- APS – Acoustic Parking System
- ARM – Active Roll Mitigation
- ARS – Advanced Restraint Systems
- ASC – Anti Skid Control
- ASF – Audi Space Frame
- ASR – Acceleration Slip Regulation
- ASSYST – Active Service System
- ATC – Active Tilt Control
- ATC – Adaptive Transmission Control
- ATTS – Active Transfer Torque System
- ATV – All-terrain vehicle
- AUTOMATIC PARKING – Assisted or automatic parking
- AUTOMOBILE – Automobile
- AVCS – Active Valve Control System
- AWD – All Wheel Drive
- AWS – All Wheel Steering
- AXLE ARTICULATION – Axle Articulation
- AXLE RATIO – Axle Ratio
- AYC – Active Yaw Control
- 4ETS – 4 wheel Electronic Traction System
- 4MATIC – 4 Wheel Drive and Automatic
- 4WD – Four Wheel Drive
- 4X2 – Two Wheel Drive
- 6×4 – 6×4
- 6×6 – 6×6
- BAS – Brake Assist System
- BELT FORCE LIMITERS – Belt force limiters
- BFD – Brake Force Display
- BHP – Brake Horsepower
- BI-XENON HEADLAMPS – Bi-xenon headlamps
- BODY ROLL – Body roll
- BODY SIDE STEPS – Body-side steps
- BOTTOM END POWER – Bottom-end power
- BRAKE CALIPER – Brake caliper
- BRAKE FADE – Brake Fade