Lately I've been hearing a quiet tiny trumpet like sound from somewhere underneath the steering wheel. It appears when I release the brakes and shuts up immediately if I press the brakes again even very lightly.
If I don't press the brakes, the sound will fade out in ~10s and during this it's frequency will slowly raise.
I only hear this when the car is stationary and even when I turn the engine off. But the sound is probably there also when I'm driving, I just can't hear it then.
It also happens that when I reapply the brakes to shut the sound, when I release the pedal, it sounds again. Sometimes it does so even 2 or 3 times, while sometimes it doesn't appear back already in first try.
Braking is otherwise totally normal, I haven't experienced any hard pedal or anything.
Any idea?
If I don't press the brakes, the sound will fade out in ~10s and during this it's frequency will slowly raise.
I only hear this when the car is stationary and even when I turn the engine off. But the sound is probably there also when I'm driving, I just can't hear it then.
It also happens that when I reapply the brakes to shut the sound, when I release the pedal, it sounds again. Sometimes it does so even 2 or 3 times, while sometimes it doesn't appear back already in first try.
Braking is otherwise totally normal, I haven't experienced any hard pedal or anything.
Any idea?
