IberFrio Reefer Unit Sound v1.1 (1.61.x) for ETS2

Features – Realistic refrigeration unit hum and engine‑start noises that actually play when you couple a trailer. – Works with all SCS reefer rigs: Schmitz S.KO Cool, Krone Cool Liner, Kögel Cool, Schwarzmüller and Tirsan SRI. – Unit sound begins with a short beep + engine start at coupling and stops when you uncouple. – The hum continues while driving and even when the trailer is stuck in traffic (quiet, only when you’re close). – Inside the cab the noise is noticeably softer; you can adjust its level via Options → Audio → Trailer Noise. – Compatible with the Sound Fixes Pack (place this mod higher in the load order) and will override any other reefer‑sound addons.
Changes in v1.1 – Sound now activates immediately after loading a save that already has a reefer attached. – Added faint unit noise for reefer trailers in traffic. – Improved continuity of the hum while driving. – Start beep is quieter. – Better balance between cabin and exterior volume.
Tested on ETS2 version 1.61.x.