1.Before buying, please check whether the car has an AMI interface. Without this interface, this cable cannot be used. 2.The location of the AMI interface is different for different car models, usually in the armrest box or glove box.
AMI location of different models
A1:In the storage box in front of the co-pilot old/13 A4L:Only sports type with AMI interface A6L/A7/A8L/Q3/Q7:In the armrest box Q5:on the right of the glove box in front of the co-pilot