i just purchased a S60 non-turbo, 2001 automatic. its for my daily driver. The problem is that its making a weird noise from the ingine compartment only when i am driving, or when the transmission is on drive, when i put it on neutral or park, it stops making the noise. its not a cliking noise, its more like a siren noise. i checked all belst and all are tensioned. what could it be?

 

Is it like a vibration noise?
Maybe the upper engine mount is bad.