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 | Koni FSD Struts | M3 e36 / e84 bumpstops | lux H8 Angel Eyes | LCI Tail Lights | OEM 6FL USB/iPod Retrofit | OEM Bluetooth Retrofit | MULF2 | M-Tech Steering Wheel | LCI Paddle Shifters