Will this diffuser scrape on steep driveway angles or speed bumps?

The Autobahn profile is designed to sit close to the bumper line without dramatic extension. Verify ground clearance on your specific setup before final installation. If you frequently encounter severe inclines, measure the extension against your current ride height and suspension geometry.

Do I need to drill new mounting holes, or does it use the factory bumper attachment points?

This diffuser is engineered for factory mounting points on AMG models. Verify your bumper's fastener locations before assembly to confirm alignment. No additional drilling should be required if the OEM mounting structure is intact.

Is this functional downforce or purely cosmetic?

The Autobahn design is primarily aesthetic — it complements the rear bumper profile and adds visual depth to the lower section. While FRP construction is lightweight, any aerodynamic benefit at street speeds is minimal. This is a styling upgrade first.