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For 1) if you slowly release the brakes then they can "drag" on the disks for longer and as the disks start to rotate, either through grade or suspension load, then you hear the sound caused by friction. For 2) as you select reverse, then the drive train, being an automatic is being loaded into turning the opposite direction which will absorb all ...


I have the exact same issue. I suspect it's related to either the belt or the pulley. Check if they're aligned properly, and there is excessive wear.


According to this reply in a German car forum, it's the throttle valve, which is controlled using a PWM signal. Apparently, as soon as the engine has power, the valve is brought into a standby position, the PWM signal of which causes the noise. When switching the engine off, the valve is brought into its end positions multiple times (for calibration?), which ...

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