Thanks Tony
attached is the dashboard light problem
Update after 2 months of further driving.
Very pleased with results. DPF regeneration eliminated and fuel consumption is lower by 0.6 of a liter per 100km.
Oil level remains constant and no longer contaminated by diesel fuel.
Blanketed EGR valve working with no problems except I have a new error code from the ECU about the EGR valve - to be expected.
The car is fine - is just a pity that FIAT basically ignored my problem and I had to find my own solution.