New Actros plastic parts and more v3.7.1

Change log:
Version 3.7.1 (2016.06.13)
+ Update for Patch 1.24
+ Added Advanced Trailer Coupling
+ Added support for National Window Flags DLC
+ New Sunshild with Light Options
Interior credits:
Idea, testing, support: GlenniBoy
Tweaking: davidzoli
Others: SCS Software (original models), SweetSoulSister (Steel texture, DeviantArt)