I had a ding similar to that (mine was about 3-4 inches long), I found a mobile dent removal service on yelp, called them out and they pulled it out. Theres no sign of there ever being a dent there. Cost me 120.
2007 BMW 328i Coupe
Space Grey | Black Interior/Aluminum Trim | BMW Performance Springs | Bilstien B8 Sport Struts | lux V5 H8 Angel Eyes | LCI Tail Lights | OEM 6FL USB/iPod Retrofit | OEM Bluetooth Retrofit | MULF2 | M-Tech Steering Wheel | LCI Paddle Shifters | OSRAM CBI