A Mercedes-Benz 105Ah battery is a high-capacity power source, typically an AGM (Absorbent Glass Mat) type, crucial for modern vehicles with complex electronics, Start-Stop systems (like in GLE, GLS, S-Class), and high power demands, offering superior performance (often 950CCA+) and compatibility over generic batteries, with brands like VARTA, Bosch, Energizer, and Enertec being common suppliers. It's essential to match the specific battery type (AGM/Lead-Calcium) and size (DIN105/LN6) for optimal function and sometimes ECU registration, though basic replacement might only need driving after installation. 
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