In this chapter you will find information on the following subjects:
⇒ Warning and indicator lights
⇒ Steering system informationThe power steering system not hydraulic, it is electro-mechanical. In both cases, the power steering works only when the engine is running.
The hydraulic power steering system uses hydraulic lines, hydraulic oil, a pump, a filter, and other parts to maintain a constant oil pressure in the hydraulic system.
The electromechanical power steering system automatically adjusts to driving speed, steering torque, and the steering angle of the wheels. It delivers extra steering force only when you are actually turning the wheels. The electromechanical power steering works only when the engine is running.
More information:

Warning
Steering
Warning and indicator lightsVolkswagen Tiguan Service and Repair Manual > Refrigerant Circuit, Flushing (Cleaning) with Refrigerant R134a: Flushing Circuit Block Diagrams
Note
The arrows in the following illustrations show the direction of
refrigerant flow while flushing. During flushing, refrigerant flows in the
opposite direction than during A/C system operation, therefore the high
pressure side of A/C service station is connected to A/C compressor at low
...