Poor idle problem sprinter 311

[Ollieod]

Hi,
Having a bit of trouble with my 2007 sprinter 311cdi. When I'm coming to a stop the engine sounds really rough right up until I stop completely then it will just idle normally. Struggling to find anyone locally who knows what it is and don't want to pay merc prices to get them to diagnose!! Also my engine sounds really rattly and horrible at idle but if I just up the revs by a hundred or two rpm it's perfect??
Hoping someone may have a few ideas.
Many thanks

 

[Ollieod]

Any help would be appreciated

 

[mersum1es]

Check your injectors, return leak and electrical correction values...

 

[Sammckane]

My sprinter 313 is having the same problem, did you find out if it was the injectors causing this??