"4) When car is at idle and stopped, I turn on the AC, I head a sound sort of like khar khar (faint sound). As soon as i press accelerator a little or car starts running in first gear the sound disappears."
Same problem with my car - Also, it is there only in the morning (when the car has been off for at least 7~8 hours).Do share if you find the bug, and its solution!