Filling device for a motor vehicle operating fluid container

A filling device for an operating fluid container for a motor vehicle, comprising:

• a mouth hole connection piece into which a dispensing valve is introducible to fill the operating fluid container,
• a compensation chamber in fluid communication with the mouth hole connection piece;
• and
• a connection piece arranged between the operating fluid container and the compensation chamber, the connection piece in fluid communication with the operating fluid container and the compensation chamber,
• wherein the connection piece has an upper portion and a lower portion;
• wherein the upper portion of the connection piece protrudes into the compensation chamber towards the mouth hole connection piece;
• wherein the upper portion of the connection piece is arranged spaced apart from the mouth hole connection piece and such that the dispensing valve is introducible through the mouth hole connection piece into the connection piece;
• wherein the upper portion of the connection piece is surrounded by the compensation chamber and arranged therewith such that, when an operating fluid in the operating fluid container overflows and rises into the filling device, the operating fluid level fills the connection piece before flowing downstream to the compensation chamber.