Hi everybody. I have this mondeo mk3 2002 2.0 Duratec HE that sometimes a metalic ratteling sound. I only hear it when driving the car. There is nothing when in idle and/or car i holding still

Please hear the last seconds of the movie i have made

Sound can come when i accelerate or after some time driving at steady speed

http://youtu.be/q40pV2HAF4w

Look forward to hear from somebody that might know what is causing this.