Soot all over engine bay

[bredhurststeve]

I have a 3.0 TDI and have soot all over the engine bay and exhaust smells in the car which I suppress by pressing the recirculating button, there is a pipe under the turbo which looks like it has a split but I cannot find what part this is , any ideas ?
the one below the turbo nut, not a great picture

 

[abmat]

Think it recirculated exhaust back into the inlet or similar