Vehicle door glass run and method for assembling the same

A method of assembling a vehicle door glass run, which is mounted on a window frame extending in a manner defining a window opening of a vehicle door from an exterior of a cabin, and seals between the window frame and a window glass, the method comprising:

• preparing a glass run body having an insertion groove into which a glass run mount extending outward from an upper part of the window frame is inserted, and a trim strip assembled on an exterior part of the glass run body and extending in a front-rear direction of a vehicle;
• providing upper and lower parts of the trim strip with upper and lower trim-strip-side mating portions extending in a front-rear direction of the vehicle and configured to mate with the exterior part of the glass run body;
• providing the exterior part of the glass run body with body-side mating portions extending in the front-rear direction of the vehicle and configured to mate with the upper and lower trim-strip-side mating portions, providing the exterior part of the glass run body with an upper contacting portion formed of an elastic material and configured to contact the upper
• trim-strip-side mating portion of the trim strip, and providing the upper contacting portion with a portion contacting the trim strip and providing the portion with a coating;
• having the coating have a kinetic friction coefficient, to the trim strip, lower than an elastic material forming a covered portion of the upper contacting portion by the coating;
• and
• assembling the trim strip on the glass run body by mating the upper and lower trim-strip-side mating portions of the trim strip, from one ends of the upper and lower trim-strip-side mating portions of the trim strip, in a longitudinal direction, with one ends of the body-side mating portions of the glass run body in the longitudinal direction, and then, sliding the trim strip along the glass run body in the longitudinal direction.