I read "cardboard box" in the original text for the scope of delivery, which is clear enough. I bought the part a long time ago and don't know whether it came with an L-box. L-boxes are a dime a dozen...
What is much more remarkable is that this part does not allow mitre cuts. If that is essential, you need to look at other models.
It's probably just a mistake. I have it myself, but I really couldn't say what mine is exactly like. However, according to BOSCH, there's only one promise regarding the machine: "The GST 18V-LI S Professional also has constant speed, LED light, pendulum stroke, precision control and speed preselection".