AUDI: SERVICING GROUND WIRE. WATER MAY ENTER THE WIRING HARNESS. VEHICLES MANUFACTUREED WITHIN A SPECIFIC PERIOD IT IS POSSIBLE THAT, DUE TO THE ROUTING OF ONE OF THE GROUND WIRES, WATER CAN ENTER THE SHEATHING (CORRUGATED TUBE) OF THE GROUND WIRE AND THEN GET INTO THE WIRING HARNESS. *PE