Of course, you can’t talk about the S-Class cabin and not mention the absolutely OTT Burmester 4D surround sound system. Packing in 39 speakers inside the confines of a car cabin is no mean feat and on the S400d, this includes 31 actual speakers planted strategically around the doors, A-pillars, roof, rear parcel shelf, boot and even the subwoofers bolted to the chassis! Beyond the actual speakers, there are also two “exciters” inside every seat, synced to massage your body with the music so you not only hear the music but also feel it. This boils down to personal preference, but as a novelty feature, it’s best kept at minimum for a pleasant change.
The level of customization is bewildering, letting you choose a VIP seat for optimised sound for the money maker, level of surround effect, EQ presets and if nothing else works, you can engage in a complete re-profiling of the sonic signature via a guided tutorial! As expected, the result is pretty epic, with a sense of scale and depth that is rarely heard in the closed environs of an automobile. It never leaves you wanting for more power or dynamics and even the timbral accuracy is of a high order, making for an unforgettable drive even at lower than normal or background listening levels. Then, there are the actual theatrics of the tweeters rotating in and out of their sockets when the system is active, along with an ambient lighting ring around them!
What you’d expect at this level, features like wireless Apple CarPlay, USB-C charging ports, rear entertainment screens with a wireless touchscreen remote controller tablet, massaging seats with heating and cooling are all present. But, it also gets screen sharing, where you can simply drag and drop media content between the infotainment screen in the front and the twin rear passenger screens. A huge sunroof, split into two sections keeps things bright while the rear seat opposing the driver does a whole dance to recline into business-class-like comfort at the touch of a button.