Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Automatic Volume Control
With automatic volume, the audio system adjusts automatically to make up for road and wind noise by increasing the volume as vehicle speed increases. On first design Bose amplifiers (class 2) the system uses a noise compensation microphone to monitor cabin noise and increase volume as needed, press the AUTO VOL button until AVOL ON appears on the display, to turn off press AUTO VOL button until AVOL OFF is displayed. On second design Bose amplifiers (non-class 2) and base radios the radio uses a vehicle speed signal, received via class 2 message to adjust volume based on speed, press the AUTO VOL button to select LOW, MEDIUM or HIGH. To turn AUTO VOL off, press until AVOL OFF is displayed.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.