The Citroën C4 builds the aromatherapy right in

Apparently those little hanging Magic Tree car air fresheners weren't doing it for Citroën, because they're adding a scent-diffuser to the ventilation system of their new Citroën C4 car as a standard option. They're offering nine different fragrances, available in packs of three—Vitality: mint and musk; jasmine and mimosa; citrus and passion.
Travel: vanilla; cinnamon and ginger; amber and sandalwood. Well-being: lotus flower; soft lavender; ylang and bamboo.
Each refill is supposed to give you about six months of people asking "Why in the hell does your car smell like Cinnabon?"