You want a great battery for your car. I installed a CL600. Its a black battery mercedesw benz sells. It will fit right in your 500. Its the same demension as all our big batteries. Its a deep cycle. It has 850 CCA. I let this thing discahrge so many times from working on my car. Jump started fires right up no charging. I have had this battery for a few yrs now. It came out of a 140 chasis. Mercedes benz has 2 batteries the big one and small one for all the early generations MB's. Now the new tech stuff.
They take different sizes since there are so many more complicated control units, antenna etc...




My 2cents



Guido

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500E Sold
2006 Mini Cooper S
Modified,pulley,injectors,suspension
2009 E350 Sport AMG package