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

MODEL 172 with CODE (B03) ECO start/stop function 

Fig 1: Identifying Additional Battery Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
	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 poisoning caused by 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 short circuit. Risk of burn injuries caused by battery positive to ground. Only fill liquid battery electrolyte (diluted swallowing battery electrolyte (contains sulfuric acid) into suitable and appropriately marked containers.	AS54.10-Z-0001-01A
	Notes on battery		AH54.10-P-0001-01A
	Notes on AGM battery		AH54.10-P-0002-01A
1	Move left front seat all the way forward and fold backrest forward
2	Switch off ignition and remove transmitter key or KEYLESS-GO start/stop button from electronic ignition lock control unit	KEYLESS-GO start/stop button only with code (889) Keyless-Go.
3	Remove luggage net (1)
4	Fold up rear wall cover (2) until ECO start/stop function additional battery (G1/13) is accessible	Secure the rear wall cover (2) to prevent it from folding down.
5	Unscrew nuts (3, arrow)		*BA54.10-P-1014-01C
6	Remove brace (4)
7	Remove additional battery cover (5)
8	Remove bolt (6) and detach ground line (7) from ECO start/stop function additional battery (G1/13)		*BA54.10-P-1013-01C
9	Using diode test lamp, check on-board electrical system for voltage between positive line (8) of ECO start/stop function additional battery (G1/13) and disconnected ground line (7)	If the diode test lamp lights up, the on-board electrical system is still active because of a defect in the electrical system. In this case, disconnect the ground line of the on-board electrical system battery. ↓
		Disconnect/connect on-board electrical system battery ground line Cover positive line (8), there is a risk of short circuit! The electrical system must be repaired once the required work has been completed.	AR54.10-P-0003W
10	Remove bolt (9) and detach positive line (8) from ECO start/stop function additional battery (G1/13)		*BA54.10-P-1013-01C
11	Pull vent hose (10) off ECO start/stop function additional battery (G1/13)	Pay attention to routing of the vent hose (10) without kinks.
12	Remove ECO start/stop function additional battery (G1/13) from rear wall
13	Install in the reverse order

BATTERY

Number	Designation			Model 172
BA54.10-P-1013-01C	Bolt, battery cable to battery terminal on additional battery	M6	Nm	6
BA54.10-P-1014-01C	Nut, bracket for additional battery	M6	Nm	6