I am new to the forum and have read through many posts about noise from the engine compartment. I have a 2001 S60 2.4 with a noise that sounds like a ticking noise from the front right wheel well. It sounds like there is a small speaker making the ticking/popping noise. It occurs when the car is off. I can walk into my garage just about anytime and stand for a few minutes and listen to it tick/pop. I have crawled under and cannot pinpont the area. I am completely stumped and would greatly appreciate any advice. Thanks. Rob