My friend is replacing a Ecu in his 2.0 tdi bkd.
He doesnt want to fit it until he knows 100% how to.....basically its not just plug and play but from what we have read up on the internet,once the original is disconnected,before it re-fitted some procedures must be followed........any ides what the procedures are? heres what we read:

After installing a new engine control unit, the
following operation must be performed:
– Activate engine control unit in “Guided
Functions” under the test procedure /
function “Renew engine control unit