An update.
ODB Tuning in Karlstad did repairs on the ECU.
They told me there were no traces of water in it. Weird as Audi had claimed it was damaged by water
There were however damage to the contact. See the top on the middle contact. Plus it was cracked in the lower part, which they have tried to glue.
And there was one pin missing in the 4th contact from the left. The second row pin 2 was missing (again counting from the left).
They also replaced a gasket.
1500 SEK.
I love these guys
They repaired the Driver Information Display and coded my new keys to the car.
ECU dropped off at Audi before closing hours
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Johannes
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Audi S8 -99, Pearlescent, Alcantara/silk napa leather, Burr walnut insert, Alcantara roof lining upper pack
A8 32V engine
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Jeep Grand Cherokee -98