The Great Gatsby, terraced with a labyrinth of wind-shields

Could you please tell me the signification of "terraced with a labyrinth of wind-shields " in the description of Gatsby's car in the chapter 4?

I’d seen it. Everybody had seen it. It was a rich cream color, bright with nickel, swollen here and there in its monstrous length with triumphant hat-boxes and supper-boxes and tool-boxes, and terraced with a labyrinth of wind-shields that mirrored a dozen suns. Sitting down behind many layers of glass in a sort of green leather conservatory we started to town.

Thank you.