Will this scrape on steep driveway inclines?

The diffuser sits at the same rake as the OEM plastic unit, so incline clearance is identical to factory. Verify your driveway approach angle against your vehicle's breakover specifications before installation.

Do I need to prep the carbon fiber before installing it?

The diffuser arrives fully finished with clear coat protection. Check the mounting area on your bumper for dirt or damage, and ensure fastening points are clean and secure before bolting on.

Is this functional diffuser or cosmetic?

This is a cosmetic piece styled to match the AMG Power look. It provides visual appeal and weight reduction; for aerodynamic downforce, consult your vehicle manufacturer's specifications for validated aero components.