I played Verrückt for the first time today and heard those six numbers, and was pretty underwhelmed with the results of my Google search.
The numbers are 4 8 18 16 43 42, which are not the same as the numbers in Lost.
Now here is my idea for the meaning: 43 and 42 are both years during WWII, which I believe is around the time of all this zombie stuff (I really know nothing about the zombie story.)
So if you take every other number out of the sequence you get 4-18-43 and 8-16-42. 4-18-43 was the date of the "Palm Sunday Massacre" and also "Operation Vengeance", while on 8-16-42 a 2-person crew of a US naval blimp disappeared over the Pacific Ocean and the blimp crashed in California.
I don't know if my interpretation is correct or if those dates could be meaningful to the story, but I wanted to throw it out there for someone else to do more research.
