LEGO MOC Trailer for 8109 flatbed truck by Johan81 | Rebrickable - Build with LEGO
User manual Lego Technic 8109 (English - 60 pages)
If I had known that the 8109 set costs over 500 euros (540 USD) today, I would have stowed it away better. This set was discontinued in late 2012. : r/lego