Hi
Under no circumstances would I recommend running the vehicle with contaminated fuel. Diesel has a lubricating property which the fuel injection pump & system depends on due to the very fine working clearances involved, petrol on the other hand does NOT. The outcome of running with petrol in the system can be a seized fuel injection pump. I would suggest the system be drained completely and re-filled with clean diesel, then bled through, including all filters being changed, then bleed the injectors and pray prior to starting the engine. I know of a police BMW diesel where they attempted to "top up with diesel" and run it. The outcome was that all the fuel system had to be changed, very expensive!
Good luck