Where is the ECU and Immobiliser Box?

[avantiblue]

where are the ECU and Immobiliser Box in the Audi A4 B5, and are they both in the same position for the avant and the saloon and does anyone have any pictures to show what they look like?

[adamss24]

The immobiliser is integral to the instrument cluster, the ECU is inside the black box in the plenum chaimber, under the bonet !