I have a black cased Bosch in the 300D. I don't know where it originally came from. It was a brand new battery that was in another Mercedes that I bought a few years back.
I'm curious to see how long it will last. I think it's about 4 years old now.

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DJ


84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012

I have charged it up a few times over the years, added some distilled water also, just routine battery maintenance.
I guess there are just not many electronic items in this car to drain the battery while it sits in the garage. Now my 07 BMW 530i has to be on a trickle charger when it is parked for more than one week at a time. If not, my voltage will go from 12.7 down to 11.6 in a weeks time. BMW has a lot of issues with their batteries.

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John
1986 300sdl
1985 380se