W211 misfire, power loss and smoking.

[BigDoug]

I have a 2005 W211 E320 with 135,000 on the clock. It has been running faultlessly but, after filling the tank to full, (from about one third full), the engine misfires, especially when pressure is applied to the throttle pedal, it has a lack of power and emits black smoke when revved while stationary.
Does anyone have any ideas what the cause could be ? (The tank was filled with "Premium Diesel" from a Costco filling station, but this may be irrelevant.)
Doug

 

[AMGeed]

Carefully check your boost pipes for leaks or splits Doug.