Modified Peterbilt 389 v 1.3

– Added patch 1.19 mod manager files
– Made the cabin steps as accessory and paintable
– Made the exhaust as accessory
– Added 3 new exhaust types from optimus prime mod
– Added 2 new engine types: Cat 3406, Cummins Signature
– Updated engine sounds to newest version from kriechbaum
– Added wipers interval mode
– Added accessory interior light, 4 colors
– Some fixes at the truck model

Thing to do and future plans:
Tweaking def’s
Own wheels
3rd type of chassis with round front lights

Authors: maxx2504, viper2, zanko