Draw a long, low horizontal rectangle for the car body
Add a sloping roofline and a short rear deck
Sketch the front hood with a slight downward angle
Mark the wheel positions with two circles on each side
Draw the front bumper with a wide lower intake
Add the kidney grille in the center of the front
Sketch slim headlights angled toward the grille
Shape the fenders to look wide and muscular
Draw the side windows with a sharp coupe profile
Add the side mirrors near the front windows
Sketch the door lines and subtle body creases
Draw large alloy wheels inside the wheel circles
Add the tires with thicker outer outlines
Sketch the rear bumper with sporty contours
Add taillights with a thin, horizontal shape
Draw the trunk lip spoiler if desired
Refine the front splitter and side skirts
Add vents, trim lines, and M4 styling details
Erase extra guide lines
Ink the final outlines
Shade the body, windows, wheels, and shadows
Add highlights to the paint and glass