On page 6 of the Repair pdf document ... area #10 is critical area concerning window glass leaks, where a part called a Frame Connector resides ... Left is pn 911.542.065.41, Right is pn 911.542.066.41. The parts guy at Vasek Polak called it a 'squeegee' when I ordered a pair in 1978. Rivet is pn 900.056.003.20, and countersunk M5 x 8 screw is pn 900.270.050.07. The condition of the bonded rubber part of the squeegee is critical, and a tight, snug fit of the upper front leading edge of the window glass is important to eliminate window leaks!
Here are some screenshots ... part #15 is the culprit in the first, #12, #13 & #14 in the second:
