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Remove/install additional battery - AR54.10-P-0007GW

MODEL 463 with CODE (MJ7) Stop/start function as of model year 2013/facelift 2012 

Fig 1: Additional Battery Remove/Install Components
G10780890Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install     
DANGER Risk of explosion  caused by escaping oxyhydrogen gas. Risk of injury  caused by caustic burns to eyes, skin and mucous membranes from battery electrolyte (contains diluted sulfuric acid) or metal spatter due to short circuit. Risk of burn injuries  caused by short circuit. Risk of poisoning  caused by swallowing battery electrolyte (contains diluted sulfuric acid) or absorption of lead over the skin or orifices No fire, sparks, open flames or smoking.
Wear acid-resistant gloves and clothing and safety glasses with side guards.
Do not place any conductive objects on the battery and avoid any short circuit from battery positive to ground.
Only pour liquid battery electrolyte (diluted sulfuric acid) into suitable and appropriately marked containers.
AS54.10-Z-0001-01A
NOTES Notes on battery   AH54.10-P-0001-01A
IMPORTANT Notes on AGM battery   AH54.10-P-0002-01A
1 Remove on-board electrical system battery   AR54.10-P-0005GW 
2 Unscrew nut (1)    
3 Remove bracket (2) from additional battery for ECO start/stop function (G1/13)    
4 Remove ECO start/stop function additional battery (G1/13)    
5 Install in the reverse order