The phrase "unique grille" means a special and one-of-a-kind design or pattern on the front of something, often referring to a car's front face or a window covering. Full definition
Every trim level has its own unique grille design so you can stand out in your ride. (tempechryslerjeepdodge.net)
The hybrid model is differentiated from the gasoline model by its own unique grille and bumper design. (hybridcars.com)
In addition to the larger size, the Santa Fe has distinct exterior styling cues including unique grille with thinner horizontal grille bars, lower fascia graphics, elongated rear window treatment, unique rear taillights and wheel designs. (prnewswire.com)