Charging door assembly or tank door assembly of a motor vehicle, and motor vehicle

A charging or tank door assembly of a motor vehicle, the charging or tank door assembly comprising:

• a base body forming a partial enclosure configured to receive a charging socket or a tank inlet;
• a door body, which is coupled to the base body at a pivot point such that it is pivotable about an axis of rotation, the door body further comprising a mating extent configured to mate with a panel body along a mating length, the mating length defined by all points of contact between the door body and the panel body,
• wherein, in a first position of the door body, the door body is configured to close an opening in a body of the motor vehicle and to block access to the charging socket or to the tank inlet by the panel body being positioned to mate with a portion of the body of the motor vehicle to block an opening of the partial enclosure of the base body, and
• wherein, in a second position of the door body, the door body is configured to release the opening of the body of the motor vehicle and the access to the charging socket or to the tank inlet by positioning the panel body away from the body of the motor vehicle;
• and
• a push-push mechanism configured to lock the door body and to release the door body in the first position thereof,
• wherein, relative to the first position of the door body, the push-push mechanism is arranged on a different side of the axis of rotation than all or most points of contact between the door body and the panel body.