Check condition of additional battery - AR54.10-P-1128SX

MODEL 216, 221 with CODE (B03) ECO start/stop function 

Shown on model 216 

Fig 1: Identifying Additional Battery

Courtesy of MERCEDES-BENZ USA

	Removing
	Risk of explosion  caused by oxyhydrogen gas. Risk of poisoning and caustic burns  caused by swallowing battery acid. Risk of injury  caused by burns to skin and eyes from battery acid or when handling damaged lead-acid batteries	No fire, sparks, open flames or smoking. Wear acid-resistant gloves, clothing and glasses. Only pour battery 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	Remove center paneling (1) in trunk		AR68.30-P-4600SX
	Checking
2	Visually inspect additional battery for ECO start/stop function (G1/13) for signs of external leaks	If leaks found, replace additional battery for ECO start/stop function (G1/13). See: ↓
		Remove/install additional battery for ECO start/stop function (G1/13)	AR54.10-P-0007SXS
		Dispose of on-board electrical system battery	OS54.10-P-0001-01Z
3	Charge additional battery for ECO start/stop function (G1/13)		AR54.10-P-1129-01A
		Cold test current Battery tester	*BE54.10-P-1002-01A
4	Reduce increased voltage after charging process	For an additional battery for ECO start/stop function (G1/13), that has been detached from the on-board electrical system, and if the "Surface voltage" message is shown on the Midtronics battery test / test equipment display. Battery tester If the voltage increases after removal, check the additional battery for the ECO start/ stop function (G1/13) again.	AR54.10-P-1129-03A
5	Charge additional battery for ECO start/stop function (G1/13)	With the test code "Charge and check" on the Midtronics battery tester. After charging, check additional battery for the ECO start/stop function (G1/13) again.	AR54.10-P-1130SY
	Install
6	Install center paneling (1) into trunk		AR68.30-P-4600SX