Here's how to remove the front bumper cover.
For G11/G12 versions up to 03.19 or G30/G31/G38/F90 any version:
Grip the lower part of the front ornamental grille (1) and clip it out.
Swivel the upper latch mechanisms (2) upwards to unclip them.
Avoid contact between front ornamental grille (1) and bumper panel!
Pull off front ornamental grille (1) to the front.
2 – Partially remove the front section of the front wheel arch cover
3 – Remove front bumper panel
Schematic diagram is for example purposes. Some parts may differ in certain details.