2009 Mercedes-Benz C300 4MATIC Q&A
2009 Mercedes-Benz C300 4MATIC Question: Can I get my battery replaced under the factory warranty?
I doubt it because it seems like your battery might be 4+ yrs. Also batteries are maintenance item. I would say ask your regular independent Automotive Service Facility and have perform a battery/charging analysis to see what is cause of your vehicle malfunction. Best of wishes. - M and R Car Import