Following is a message from Christine of Alcester Car audio in the UK regarding the availability of a gizmo to create an auxiliary input for stock head unit in a new C class.<br> <br> I am very sorry to say but at this time we can not help you . My contact in Germany could not help I have approached two companys in the UK who can not help either they are our main UK suppliers . One of the company's how ever are working on this and hope to have alead out at the end of this year there problems at the moment are working with the fibre optic leads. In regards to this I will keep your details on file and will let you have any information on it, as and when its available to us. May be you could post some info regarding this on your forum to let others know who are in the same position as your self.