Achim,
The battery that I am replacing, A 003 541 33 01, was in my 280SL for 13+ years. It is the same like battery as my replacement, A 002 541 87 01 26, in size, looks (white), 6 white water plugs, terminals, etc. and was originally shipped dry, hopefully I can get 10+ years out of it. Someone told me these batteries were produced by Interstate for Daimler Benz. I do agree with next battery down the road, if DB does not have these produced again, a Bosch, at least it's a German company that has many electrical parts on our SLs.
Bob