Three hours to go. @adamchristo in the lead behind the wheel of #AMGGT3 #4 in a close battle to the finish. Watch our @24hnbr documentary on YouTube. #24hNBR #24hAMG #MercedesAMG #AMG #24h #Nurburgring #GreenHell #BlackFalcon #AMGGT3 #DrivingPerformance #CarsofInstagram #InstaCar