Volvo FH 2013 [ohaha] v18.3s

v18.3s
– new tandem accessory – tipper
– side-skirts for tandem chassis (plastic, truckpaint, box color)
– reworked wipers base a little
– reworked headlights
– various tweaks and fixes

WARNING
Before activating the new version of the mod, you should go to a truck shop and revert to a basic configuration (4×2, Sleeper cab, no custom accessories, if possible). Or sell the truck. Also applies to hired drivers’ vehicles.
Errors due to missing accessories, generated by the changes in the definition files structure will be permanent, otherwise.
After activating the new version, buy them again (I tried making most of the add-ons a lot cheaper than vanilla).