Volkswagen Golf GTI 2016, Owner'S Manual

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Please note, however, that not all brake fluids that comply with U.S.
Federal Motor Vehicle Safety Standard (FMVSS) 116 DOT 4 have
the same chemical composition. Some of these brake fluids can
contain chemicals that could, over time, degrade or damage internal
parts of the vehicle’s brake system.
Volkswagen therefore recommends that you use brake fluid that
expressly complies with VW Standard 501 14 for optimum brake
system performance over the long term.
Brake fluid level
The fluid level in the transparent brake fluid reservoir must always
be between the MIN and MAX marking → .
On some vehicles, engine components may partially block the view
of the brake fluid reservoir and make it impossible to see the brake
fluid level. If you cannot clearly see the brake fluid level in the brake
fluid reservoir, please see an authorized Volkswagen dealer or
authorized Volkswagen Service Facility.
The brake fluid level drops slightly when the vehicle is being used
as the brake pads wear and the brakes are automatically adjusted.