Mercedes-Benz battery

This is a genuine Mercedes-Benz auxiliary (spare) battery with part number N000000004039. It is a 12 volt (12V), 1.2 ampere-hour (1.2Ah) lead-acid battery. Features and function Type: Rechargeable, Sealed Lead-Acid (SLA) battery. Function: Not the main starter battery of the car. It is mainly used to support various electrical systems of the vehicle (such as the transmission electronics, the Eco Start/Stop system and the instrument cluster memory) in the event of a voltage drop or failure of the main battery. Compatibility: Used for many Mercedes-Benz models, including some years of the S-, E-, ML-, GL- and R-Class.