Had that issue twice in the first 7k miles of the car. They never really told me exactly what it was as they said many different things. It was right under the shifter so I assume it was a loose bolt vibrating.
MY15 F80 BSM/Full SO DCT
JB4 : ER DP's : K&N Filters : H&R SuperSports : TSW 20's : Hankook Ventus V12 : Painted Chrome Accents : Tinted Tails : Full 15% Tint