Please help!! ML270cdi

[chapman371]

Hi I'm wondering if anyone can help me. I have a 2003 ML270cdi and I am experiencing a problem on cold start. When it is idling it judders to the point where I think its going to stall. I think find that when I manage to pull away (say from a junction) there seems to be a lull in the gear changes. Once it goes below 1000 rpm it seems to rectify itself and its then fine. I'm a bit nervous of the car and I'm terrified of breaking down. Does anyone recognise this problem or at least have half an idea of what it could be?

Thanks

Sam