MB C class c220 cdi 2004 automatic Transmission problem

  mercedes/c-class/2001-2007

Hello, I have problem with my autumatic transmission. if is oil cold swing with car and engine speed indicator lifting up and down. after he's warm everything is ok. makes it only if is cold Eben want more gas. Please any one any idea what is wrong?  I know that is problem in gearbox  but what exactly is wrong? Thank you :).

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