Identify Audi A6 Engine Type

Hello,
I need your help again!
Okay, so in my A6, manufactured in 1998, the 2.5 TDI AFB engine was originally installed. Due to a fire, they replaced it with an engine from the same car, but manufactured in 2000. The engine control unit and other components were also completely replaced.
Is this an AKN or an AFB engine?
Perhaps the part number of the control unit will be helpful, which is:
4B0 907 401 C2 - Software 01012

Thank you in advance for your help!
Best regards, Achim.


P.S. Unfortunately, I can't see the engine number because the fuel injection pump is in the way!

Hi,
Without the '2' after '4B0 907 401 C', it would be an AKN.

Best regards, Rudi.

Hello Rudi,
Thank you for your efforts!

Best regards, Achim.