dacia diesel engine 107 ps

Hello together, have been a dacia duster diesel for 10 months, with 107 ps for some time I have been giving in cold run an extreme rattle at the gas. I have already become pre-figure in awekstatt, but can help, or you don’t want to. I have only 9000 km down, Renault already wrote, but no help. a comparison ride with a same car has resulted, that this noise is not present. probably someone has made the same experience and white advice. much Thank you