On the 2007 Mercedes-Benz E-Class Convertible (W211), specifically the E350 or E500 Cabriolet, there are multiple batteries located in different spots depending on the trim and optional equipment (like the soft top module or auxiliary systems). Here's where to look:
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Main starter battery – Located in the trunk, right-hand side, under the carpet panel near the spare tire or next to it.
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Auxiliary battery (if equipped, supports electronics/start-stop systems) – Often mounted under the cabin air filter area near the passenger-side firewall (engine bay).
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Convertible top system battery (hydraulic pump-related) – May be installed behind the rear seat or near the hydraulic pump in the trunk, behind the lining.
If you're only seeing one, the others may be hidden under panels or trims. The service manual you're referring to includes diagrams and step-by-step removal guides for each of these battery locations.
