Guide Rails, Cleaning And Lubricating.

-- Completely open the roof system and first remove any loose dirt residue in the guide rails using the Wet and Dry Vacuum Cleaner.

Fig 1: Guide Rails

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-- Remove the grease and dirt residue on the guide rails with a lint-free cloth.

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Lubricate the inside and outside of the entire guide rails -arrows-.

-- Repeat the process for the opening on the opposite side of the vehicle.