Hi, Hopefully someone knows a quick fix.. I have a clk270 54 plate facelift with audio 20 .. I brought a BT cradle of recent I can connect my samsung s4 up too the cradle fine. But for some reason on the command it says no phone. No sound comes through the audio 20 system but like i say the mobile connects to the cradle fine. All the wires are in place.. Does anyone have any thoughts on this.. only think I can think is that the fibre obtics cable going from the plug where you attach the cradle has to be set up by a mercedes technician. But I dont know.. thanks for anyones help in advance. Ben.