2 new default air brake sounds added to array.
Reworked reefer trailer sound loop and startup sound for reefer trailer sound addon.
Slight lowering of default reverse beeper sound volume.
Simplified default windshield wiper sound when wet.
Reefer trailer sounds added to default AI traffic reefer semi-trailers on the move.
Reefer trailer sounds added to Schwarzmüller Trailer Pack and Krone Trailer Pack reefer trailers in AI traffic. [ETS2 edition]
New workaround option to force the reefer sound loop to play – intended for use with ownable reefer trailers.

To use the workaround option properly:
1. Go into the Audio settings.
2. In the voice navigation menu, select “~ Function – Force enable reefer sound”.
3. Click the Preview button.
4. Reselect your desired voice navigation option OR uncheck the voice navigation.
5. Drive as usual and the reefer sound will play when you are not stationary.

Note that the reefer beep & startup sound which plays when you’re stationary is not available with the workaround option.
To stop the reefer sound with the workaround option, detaching the trailer may work. If not, restarting the game is the only way.