[ATS] Mercedes-Benz S400D v4.0 (1.40)

CHANGELOG:- – Fixed headlights (it may be reconfigured again in the next update) – Reworked sound (cabin insulation on low to medium speeds is as close to its real-life counterpart) – Reworked engine configuration from scratch and improved realism – Reconfigured transmission (improved realism) – Reconfigured chassis (improved realism) – Reconfigured tachometer animation – New license plate – Minor edits and fixes – Removed unnecessary files – Changed the tachometer display background to black