Mercedes-Benz does not make automobile batteries. Save your money and get an Interstate battery, or even a Sears battery(and Sears does not make batteries either)
There are a lot of parts other than batteries that Mercedes uses on their cars that they do not make:
Brakes and brake parts(most are ATE)
Diesel injection pumps and diesel turbos(I have two MB turbos and both have turbos made by Garrett located here in the USA. I just rebuilt the turbo (a Garrett)on my 1982 300D-Turbo.I got the parts from a place in Tx. Cost including shipping:$22.00. There really isn't much to a turbo. Bill Lewallen Lex.Ky.