Subaru Impreza WRX STI (2011)

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    Volume control
    Volume control You can adjust the phone call volume, the voice volume and the voice guidance volume. Refer to “Volume control buttons”. ...

    If the light illuminates steadily
    If the light illuminates steadily while driving or does not turn off after the engine starts, an emission control system malfunction has been detected. You should have your vehicle checked by an auth ...

    Recommended shifting speeds
    The best compromise between fuel economy and vehicle performance during normal driving is ensured by shifting up at the speeds listed in the following table. ...