Servotronic Wiring Diagram

[Bakhtiyar]

Hi guys,
I have a 540i bimmer which had a non servotronic power assistance, then I changed to servotronic power assistance also I purchased the servotronic control unit, my problem is that the electronic servo unit has five wires, 2 of them goes to the steering unit and another 2 should be connected to a ignition + and to a ground the last wire should be connected to somewhere where it could get signal from the car to control the steering sensitivity, any idea where shall I attach the last wire? Thanks in advance

Regards,
Bakhtiyar

[ivari]

You need the speed signal.