The coordinates take you to the tallest striped pole on the right hand side of the entrance to the carpark.
The final coordinates are N53 21 ABC W003 06 DEF
A = The total number of stripes plus one
B = The number of black stripes times two
C = The number of letters in the name of the stripe at the top of the pole
D = The length in cm of the third stripe up divided by ten
E = The number of letters in the name of the second to top stripe, subtract 5
F = How many colours were used to paint the pole times by four
Check sum for final coordinates 54