I have a 2004 SL500 with 46K original miles. The car starts and runs ok and once in a while I go to start the car and nothing happens. No clicking noise from the starter and I get a red battery symbol on the instrument panel. Once I get a quick jump start the car runs great. The dealer says they have been unable to find a problem. I had the comfort batter in the trunk changed recently and the starter battery they tell me is just fine. Anyone else having the same problem or can assist in assessing the problem? Need help!

 

Have you checked the alternator?

 

The shop says the alternator is fine as well!

 

Replace the battery in the Key FOB

 

Thanks for the feedback and I already did that with no change.

 

check all battery connections.... remove and clean ..look for corrosion at the connectors

 

Thanks the battery connections and posts are super clean and tight.

 

not a good idea to jump start on a r230. could mess up other modules.