Logic of naming actuators in VW-group is simple it contains "N" + actuator number. The actuator number is unique. Here you can find fitting location, connectors and some basic information about actuators.
To our mind, actuators information is reference, so there is only simple search by number.
control unit operates an electrohydraulic control element in the steering gear
of the power steering dependent on the vehicle speed. The basic function is control
of a proportional valve dependent on the road speed. The valve is controlled by
way of a current controller. The specified current for control of the valve
current is determined on the basis of a characteristic dependent on the vehicle
speed. The valve restricts the hydraulic flow through the hydraulic bypass of
the steering system according to the map.
an engine speed >500 rpm is maintained for at least 500 ms, the power stage
for the current control is enabled in the ongoing ignition process.
the Servotronic fails the power steering remains operational. The power
steering assistance is no longer adapted to the road speed however.