Hello I have the following problem since today I wanted to open the SLK but it does not happen if I want to open it with the FB the led flashes on the FB, so the battery is not, I then mechanically opened the car and my neighbors were woken up by the alarm system. In the car I wanted to finally start my drive but could not go because the key can logically plug in but can not be turned. what is the problem ? what can you do there ? many thanks