The phrase "black roofliner" refers to the color of the lining or material on the inside roof of a car. It means that the roof's interior is black in color. Full definition
There's new leather and Alcantara upholstery, GTI sports seats, a black roofliner, a leather steering wheel, aluminum pedals, door sills, and a number of R - Line logos. (topspeed.com)
The black roofliner, black panels and frames around centre console and air nozzles, R - Line door sill plates and stainless - steel pedal caps have been retained from the previous model. (topspeed.com)
GTD is fully equipped: Furthermore, Golf GTD features include details such as chrome bezels for various switches, a black roofliner and black roof pillar trim, automatic climate control, Multi-Functional Display (MFD Plus) trip computer, centre armrests and the RCD 510 radio system. (ausmotive.com)