Required Wiring Diagram for Audi A8

[AndyManwaring]

Can anyone help we need a Wiring Diagram for the A8 that showns the position/route of the wires for the BreakPad wear sensors.

He have replaces the sensor leads to all wheels and part of the loom for the drivers side front, but the mechanic is getting 7 volts reading on both front and back on the drivers side, but only 2 volts on the passenger side front and 0 volts on the rear.

The mechanic thinks the wire is a continual loop, but as the colours change as it goes round so it is difficult to follow, without knowing the route and which connectors to check.

Any help would be appreciated.