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.
Electric Drive Sound Generator, Basic Function - GF08.20-P-9890A
Model all (CAR)
Overview
This document contains information on:
- General
- Location
- Function requirements
- Function
General
The sound generators emit a warning tone in electric mode as a warning to other road users.
Example illustration
Location
The front sound generator (1) is located in the vehicle at the front right on the underside of the engine compartment. The rear sound generator (2) is located in the rear area on the underbody.
Example illustration
Function requirements
- Circuit 30t ON
Function
Depending on the speed and accelerator pedal position, the sound generators (1, 2) generate an audio signal between 0 and 30 km/h. At speeds greater than 30 km/h, the sound generators (1, 2) are deactivated, as the rolling and wind noises are loud enough for a perception of the vehicle.
Use the Manual With the Right Hardware
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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.