Grating noises while the vehicle is being driven from the area of the top door gap seal towards the vehicle roof.
Contact surface of the flock-coated door gap seal to the outer roof panel.
An all 4 doors, fit a new door gap seal.
All new seals are marked with the lettering: >>EPDM+Polyesterflock<<
The new seals may no longer be treated with Carbaflo!
After removal and before installation of the new seal, thoroughly clean the contact surface at the roof with silicone remover a number of times (BMW part number: 51 91 9 057 943).
Make sure that a fresh cloth is used for each cleaning operation.
The familiar silicone remover may no longer be used here!