general problems of the 2008 Mercedes Benz C350

I parked the car,few hours later,I try to put it on,no starting occurred,no external light ,the battery was dead. I bought a new battery but it did not function. I consulted with several mechanics and one them talled me that place where I put the key that is called the panel switch was damage and suggested me to call Mercedes Benz dealer because it happens that there was recalls that several cars had the same problems for cars from 2008 -2014. This problem affected the original battery that I had.