Correct answer
At the hydraulic circuit reservoir identified in the vehicle manual.
At the hydraulic circuit reservoir specified by the manufacturer. Its position depends on the model: it may be remote from the master cylinder or use another specified arrangement. Do not assume it is always next to the pedal, engine or air filter. Confirm the correct reservoir and fluid specification in the manual before opening or topping up; a falling level may require inspection for leaks or faults.
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At the hydraulic circuit reservoir identified in the vehicle manual.
Always on top of the engine by the pressure plate, without consulting the manual.
Always on the air-filter support, regardless of model.
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