Hi I have a A4 3.0Tdi Quattro Auto 06 which started to go into limp mode with no engine light on when you accelerating hard. I pull over restart the car its fine then it will happen again, I have notice loads of smoke when accelerating hard but that much. If anyone has any ideas please reply thanks.

I just had some work done recently to solve the coil light flashing when accelerating hard. The work I had is below.
Full carbon clean for turbo
Boost control valve
Gen Audi Fuel filter
High pressure and low pressure fuel lines cleaned
Injector bleed test