This cache has a problem. It needs three numbers to work. The three numbers are in the proper order. However, a few other numbers have inserted themselves into the list and need to Be weeded out. This will take a little bit of thought, but I'm certain you will find the proper solution!
F is one of the numbers try an extended version of something basic
And once you have selected the proper numbers and made your way to Ground Zero, you will See the cache itself is not too hard to find.
A mreb bar gjb rvtug frira fvk
B 
C ....- ...-- ---.. ...-- ----- ---..
D 
E WINDOW
F fffeef
The concept of a "reverse" wherigo originated in Germany, and there are many of them there.
The interesting thing about reverse wherigos is that there is just one "play anywhere" cartridge that works for all wherigos of this type. You can begin your search from anywhere that you want (it is not suggested that you go to the posted coordinates, though you may want to begin somewhere in that vicinity).
This Wherigo converts your player into a virtual version of the "Reverse Cache Box" which tells you the distance to the cache, but not the bearing. The cartridge was created by -Waldmeister- and is available to DOWNLOAD HERE.
Your task is to find the cache by periodically querying your Reverse Cache Box for the distance to the final location. Try to use your Reverse Cache Box as few times as possible. All instructions and necessary information needed to complete the cartridge is contained within it. The cartridge is multilingual.