Check condition of battery - AR54.10-P-1129SX

MODEL 216.3 up to 1.6.08 except CODE (809) Model year 2009 

MODEL 221.0 /1 up to 1.6.08 except CODE (809) Model year 2009 

Starter battery (G1/4), shown on model 221 

Fig 1: Checking Condition Of Starter Battery

Courtesy of MERCEDES-BENZ USA

On-board electrical system battery (G1), shown on model 221 

Fig 2: Checking Condition Of On-Board Electrical System 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
1.1	Remove center paneling in trunk	Model 216.3, 221.0, 221.1 without code (Z07) Maximum protection for checking the on-board electrical system battery (G1).	AR68.30-P-4600SX
1.2	Remove paneling in center of luggage compartment or equipment carrier plate	Model 221.1 with code (Z07) Maximum protection for checking the on-board electrical system battery (G1). Remove trim parts depending on the vehicle equipment until the on-board electrical system battery (G1) can be checked.	AR68.30-P-4600SXS
	Checking
2	Visual inspection for external leaks	If leaks are found: Replace starter battery (G1/4) and/or on-board electrical system battery (G1). Refer to: ↓
		Remove/install starter battery (G1/4)	AR54.10-P-0008SX
		Remove/install on-board electrical system battery (G1)	AR54.10-P-0009SX
3	Check fluid level in starter battery (G1/4), add distilled water if necessary	not with AGM battery
4	Test starter battery (G1/4) and/or on-board electrical system battery (G1)		AR54.10-P-1129-01A
		Cold test current Midtronics battery tester with test clamps	*BE54.10-P-1002-01A
5	Reduce increased voltage after charging process using volt-amp(s) tester	On starter battery (G1/4) or on-board electrical system battery (G1) that is disconnected from the on-board electrical system and where the message "Surface voltage" appears in the display of the Midtronics battery tester. Midtronics battery tester Volt/amp tester After reducing increased voltage, retest starter battery (G1/4) and/or on-board electrical system battery (G1).	AR54.10-P-1129-03A
6	Charge starter battery (G1/4) and/or on-board electrical system battery (G1)	With the test code "Charge and check" on the Midtronics battery tester. After charging, retest starter battery (G1/4) and/or on-board electrical system battery (G1).	AR54.10-P-1130SX
	Install
7.1	Install center paneling in trunk	Model 216.3, 221.0, 221.1 without code (Z07) Maximum protection after checking the onboard electrical system battery (G1).	AR68.30-P-4600SX
7.2	Install paneling in center of luggage compartment or equipment carrier plate	Model 221.1 with code (Z07) Maximum protection after checking the on-board electrical system battery (G1).	AR68.30-P-4600SXS