Easy terrain with hardly any elevation changes. Beware of hunters and horses (the oval pathway is a training-course for the nearby stud farm). There are paths, but they are mainly unmarked.
"Hinter diesen Auen, die still und verwildert sind wie selten irgendwo in Europa, liegt das Marchfeld, eine gespenstisch leere Landschaft, in der es Sanddünen gibt wie in den asiatischen Steppen (...)." Gerhard Fritsch, Moos auf den Steinen (1956)
Parking is available about 100 meters southeast of Stage 1 (along the road). This was the only decent parking-possibility I could find (others were forbidden and/or extremely muddy). As the hike is rather short the calculations are a bit longer. All calculations should be mathematically correct (including commata).
Stage 1:
N1 48° 16.983', E1 16 ° 49.168'
A waycross close to the road will give you some numbers and letters.
a1 = year in the second line
a2 = year in the fourth line
a3 = convert the first letter in the uppermost line to a number (A=1, B=2, ...)
a4 = a2-a1
Stage 2:
N2 = N1 - (a3+3)/1000
E2 = E1 + (a4*a3 - 2*a4 - 13)/1000
You should be standing in some sort of little glade. What species of plant prevails at this spot?
- Oak ... b1 = 131
- Robinia Pseudoacacia ... b1 = 134
- Juniper ... b1 = 137
- Pine ... b1 = 140
- Hawthorn ... b1 = 143
Stage 3:
N3 = N2 - (b1*2 + a4 + 2)/1000
E3 = E2 + (b1*5 + a3*5 + 2)/1000
This place has something in store for ...
- pheasants ... c1 = 2
- farmers ... c1 = 4
- deer (and antelopes maybe) ... c1 = 6
- land surveyors ... c1 = 8
- hunters ... c1 = 10
Stage 4:
N4 = =N3 + (a4*c1 + a4 - 2)/1000
E4 = =E3 - (a4*c1 - a4 - a3 - 5)/1000
If the inhabitant opens his door, into which direction would he look?
- North ... d1 = 45
- Northeast ... d1 = 50
- East ... d1 = 55
- Southeast ... d1 = 60
- South ... d1 = 65
- West ... d1 = 70
Stage 5:
N5 = N4 - (d1 + a3 + 6)/1000
E5 = E4 - (d1 + c1*2)/1000
Watch out for a foreign body in this surrounding. What is its colour?
- Blue ... e1 = 10
- Brown ... e1 = 20
- Green ... e1 = 30
- Yellow and Black ... e1 = 40
- Red and White ... e1 = 50
Stage 6:
N6 = N5 + (e1*a3 - a3)/1000
E6 = E5 - (e1*c1 + e1 + a4*2 + 6)/1000
As the official plate has vanished you have various possibilities to find f1. Look for a two-digit number under the bench (on the left side). If you cannot read it, there is a single digit on the right side (still under the bench), carved and dyed with a ballpen. Multiply the digit by 11 in order to get f1.
If this fails, here is your third chance: Test your knowledge about plants again. Have a look at the bush right behind the bench (not left or right). What is it?
Holly (german: Stechpalme, latin: Ilex aquifolium) ... f1 = 99
Juniper (german: Wacholder, latin: Juniperus) ... f1 = 88
Privet (german: Liguster, latin: Ligustrum) ... f1=77
As these 3 plants are totally different from each other this should be fairly easy 
.
Stage 7 (Version 2):
The coordinates are not exact, but the new board is not very far away from the old one. The formula remains the same as in Version 1.
N7 = N6 + (e1 + 7)/1000
E7 = E6 + (e1 + 3)/1000
look for a board with a lot of information about the area (in german) and with some logos on it.
g1 stars form a circle
Find a long-lost species (that has been rediscovered): The number of letters in the first word of its latin name plus 6 is g2.
Seven stars form a half-circle beneath ...:a tree: g3=3 a rainbow: g3=4 flying birds: g3 = 5
Now You have all numbers You need to calculate the coordinates of the cache.
Cache:
Stay on the path until the last few meters. There are bushes, but they don't have (many) thorns.
NC = (a1/2*g2 - d1*g1 + b1 + g3*c1 -a3 + 1)/1000
EC = (a2*g2 + b1*f1 + 3*d1*g2 + 2*g3*e1 - c1*g3 - g1 - 1)/1000
The cache is a small glass (250 ml) that once contained coffee inside a tin can that once contained coffee. Please rehide it well (animal-proof). Mind your eyes at the hiding-place. The Code on the first page of the logbook is necessary only for logging on the Opencaching site, you won't need it for GC.
Enjoy
Deutsche Beschreibung gibts hier.