Please see "A long meadow 01" for details - this also holds one of the values
The posted coordinates are for suggested parking only, there is nothing to find there. You need to have completed the "A long meadow" series and collected all four values from the front of the log-books in the various clip-lock boxes. Use this to obtain the final coordinates which will be a short walk away.
The container can be found at:
N52 14.(A+B)(C-D)(A+B+C)
E000 15.(B)(B+C+D)(C+D+D)
The final location is rather exposed with very little cover so you may need to be discreet.