Mondeo rattles when starting from cold

When starting my 2010 Ford Mondeo from cold I can hear a light rattle/tinkle when under acceleration between 1250 - 2000rpm.

There is no noise when warm and no noise when cold and not under load. There's 50k on clock. I bought the car with 15k and no service. All other services have done by main dealer.

Asked on 3 June 2013 by mondeo man 2.2

Answered by Honest John
Switch to Shell V-Power Nitro+ diesel and see if this persists after a couple of tankfuls. I think it's caused by glowing carbon deposits and the detergents in this fuel might clean them off.
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