Seal structure for motor vehicle door

A seal structure for a door of a motor vehicle, the motor vehicle having a cabin and the door having a window frame configured to support a window glass, the seal structure comprising:

• a pair of glass runs extending vertically, the glass runs being assembled to the window frame while being spaced apart from each other in a longitudinal direction of the vehicle;
• a beltline sealing member extending in the longitudinal direction of the vehicle along a beltline of the door, the beltline extending in the longitudinal direction of the vehicle between the glass runs, the beltline sealing member being assembled to the beltline, wherein
• the beltline sealing member has opposite front and rear ends in the longitudinal direction of the vehicle, the front end including a front sealing lip-shaped portion, the rear end including a rear sealing lip-shaped portion, the front sealing lip-shaped portion receiving one of the glass runs, and the rear sealing lip-shaped portion receiving the other one of the glass runs;
• the front sealing lip-shaped portion protrudes upward and toward a front end of the vehicle, is inclined upward and toward the front end of the vehicle, and forms a substantial U shape that opens toward the front end of the vehicle when viewed from above the vehicle and that receives the one of the glass runs,
• the rear sealing lip-shaped portion protrudes upward and toward a rear end of the vehicle, is inclined upward and toward the rear end of the vehicle, and forms a substantial U shape that opens toward the rear end of the vehicle when viewed from above the vehicle and that receives the other one of the glass runs, and
• at least one of the front and rear sealing lip-shaped portions includes an assembled position determination contact portion, the assembled position determination contact portion having an end face that comes into contact with a respective one of the glass runs, wherein the assembled position determination contact portion is continuous with the at least one of the front and rear sealing lip-shaped portions.