The cache is not at listed coordinates, but you can park your car there. First you have to do a little of brain excercise and then a small walk through the Bushy park.......
Sudoku
Number in the blue coloured square - A
Number in the yelow coloured square - B
Number in the green coloured square - C
Final coordinates
53.A(BxC).(Bx(A+C))(A+B)
006.A(A+B+C).(A+C)C((BxC)-B)
The cache
The cache contains only logbook, please bring your own pen . Please rehide it well to prevent many muggles from discovering it.