Inside, the 408 offers a refined cabin with soft-touch materials, layered dashboards, Alcantara upholstery in premium trims, and ambient lighting (up to 8 colours) that adjusts with driving mode. The driver-centric i-Cockpit features a compact steering wheel, a configurable 10″ digital instrument cluster, and a 10″ touchscreen—all designed for modern flair, though some users note quirks in ergonomics and reach.
Spacious layout: generous rear legroom, a 536-litre boot, and practical features like dual-zone AC, lumbar support, ambient lighting, and premium sound options (e.g., Focal 10-speaker system on GT trim) are available.