Sorted it This may help for anyone else
Please note: A3's with a build date of upto Chassis Number 8P*5B (05/2005), 3 Door Models requires a Control wire from Pin 13 on the Steering Controller to Pin 4 on the T12a Blue Connector.
Some TT's may require the Control wire from Pin 13 on the Steering Controller to the (ECU) Connector.
1.8 Petrol Engine CCDA (ECU T94) Pin 45
2.0 Petrol Engine BWA, BPY, CDMA, CDLB (ECU T94) Pin 18
2.0 Petrol Engine CCTA, CCZA, CESA, CETA (ECU T94) Pin 45
2.5 5cyl Petrol Engine: CEPA (ECU T94) Pin 18
3.2 V6 Petrol Engine: BUB, CBRA (ECU T81) Pin 38
2.0 Diesel Engine: CBBB, CFGB (ECU T94) Pin 64
Lowline Steering Controllers will require replacing, Please request details on the suitable replacement Highline controller.
Please refer to the Ross Tech List of Steering Controllers