Fender Design - Wheel Arch Challenge
Downloaded all required files and opened in CATIA V5.
Created a geometrical set for wheel arc calculations. Created a center point of wheel outermost circle and placed XY plane at same point.

Taking the refrance of the plane, created a sketch and drawn a horizontal line for datum. Isolated wheel arc diameter and fender innet arc for calculations. Finally created lines for europian standard requirement and used 150 mm line for finding the gap between wheel arc and fender arc. It is found to be 10mm which satisfies europian standard for fender design.

So we can transfer the module for next design process to complete the fender design.