Caution! The Canyon manual recommends to attach the saddle to the frame while the frame is still in the box. If you want to do so jump over to step 4 and follow the instructions while the frame is still packed.
Anyway we had the feeling, it is a lot easier if you take your bike out of its box.
Before you give it a go, you should give all the important bolts a double check and if needed do some [guide|76067|gear, brake or preassure|new_window=true] adjustments!