I forgot to mention something earlier. When I installed the Optima battery in my car about 3 months ago, I drove the car daily for a peroiod of one month and then I had the transmission failure - the B2 Piston problem. Since that point in time I have been turning the car on once a week, because the car is not driveable. It has been 2 months of me doing that until this week when the battery died.

I asked a local Mercedes independent repair shop owner who happens to be Mercedes factory trained technician about my situation and he said that he read in some publication that Optima batteries are not compatible with Mercedes computers. I have absolutely no idea what that means. He was too busy at the time to chat so I never got an explanation.

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1989 300CE Astralsilber/Schwarz
1992 300CE Schwarz/Schwarz