The cache is not at listed coordinates, but you can park your car there. First you have to do a little brain excercise and then a small walk through the Marlay Park .......
Kakuro
A - number in the red coloured square
B - number in the yelow coloured square
C - number in the blue coloured square
D - number in the green coloured square
Final coordinates
53.(CxD)/A.B((BxD)+C)
006.AxD.((AxC)-D)((2xA)-C)(A+B)
The cache
The cache contains only logbook, please bring your own pen . Please rehide it well to prevent many muggles from discovering it.