Today i tried to start my 2011 c300. When i put the key in the headlights came on and the dash lights also. However when i turned the key to the right, i got nothing. No crank, nothing. I dont know any info on current battery as i bought the car used (50k miles). If I guess I would say, the battery has been replaced in 2016. Does this sound like a simple battery issue? Or would the headlights and dash lights not come on if it were the battery? I didnt try anything else as i have another car and was leaving for work.