Keep the area around the power steering fluid reservoir clean when checking. The cover must not be opened.
Check the level frequently. The fluid does not require changing. The level must be between the MIN and MAX marks.
For recommended fluid grade, see Power steering fluid - grade.
If there is a fault in the power steering system or the engine is switched off and the car has to be towed, the steering is much heavier than normal. Read about what applies for towing.