I put new battery in 6 mths ago. Car was not driven for3 months during which time battery went dead. Now battery won't jump start or charge. What could cause this and/or fix this?
Q&AAsk Your Question
1994 Mercedes-Benz SL500
Question: New Battery ..... let go dead.....now won't jump or charge
Answer #1Valleyautotech May 12, 2010, 14:15Master
Bring the battery back to where you purchased it from as they usually have a pro-rated warranty and they can test it and give you a new one
Answer #2johneck May 16, 2013, 15:08Rookie
I have a 2003 SL 500 and this is a real problem! Firsty, there are two batteries in this stupid car. Secondly, there is a service campaign bulletin, which I guess is short of a recall, which states that there is an alternator problem, and the regulator may need to be replaced. "Approximately 279,948 vehicles are affected." The battery doesn't sufficiently charge off the alternator and the convenience systems (heated seats, etc) may be shut off due to a resulting under voltage condition. Take it to your dealer. The service campaign reference number is: 2005070017, and the date of issue of the bulletin is April 6, 2006.