Q5 really lumpy on idle and stalls

[Steven degville]

Hi all

I'm wondering if anyone can held my 2013 audi q5 2.0tdi auto is running really rough on idle.it keeps stalling.runs fine when on the road.took it to garage no engine management light on and no fault code garage can't fix it it does anybody have an idea or had the same issues thanks steve

[Magnet]

Hello Steven,

Thanks for joining and posting your plea. 
Could you let us know if there is any evidence of unusual exhaust smoke, and if so what colour. 
Kind regards,

Gareth.

p.s. Could you please complete your Profile.