When i was working at Autozone in 2004 I changed a Battery in a 93 Mercedes (dont remember what type cuz i dint own a benz then) wagon. IT was a very old mercedes battery and he was the orignal owner. As I was installing the new battery he was going through every receipt for everything that had ever been done for the car. He didnt find a recept for a new battery. He kept perfect records. The battery was factory.