Checking the alternator and regulator (Engine 156) - AR15.40-P-5000T

WARNING: This page does not describe the selected car, but rather 28 other vehicles, including the 2012 Mercedes-Benz GL550, 2012 Mercedes-Benz GL450, 2011 Mercedes-Benz ML63, 2011 Mercedes-Benz ML550, and 2011 Mercedes-Benz ML350. However, it is still accessible from the selected car via links, so may be relevant.

ENGINE 156 in MODELS 164, 209, 211, 219, 251

Fig 1: Identifying Star Diagnosis And Data Link Connector

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

	Check
	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 avoiding damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Notes on battery		AH54.10-P-0001-01A
1	Check battery for condition	Model 164	AR54.10-P-1129GZ
		Model 209	AR54.10-P-1129P
		Model 211, 219	AR54.10-P-1129TX
		Model 251 Observe notes about absorbent glass mat battery, see: ↓	AR54.10-P-1129RT
	Notes on AGM battery		AH54.10-P-0002-01A
	Dispose of battery		OS54.10-P-0001-01Z
		Assess the results, replace battery if required.
		Midtronics MCR 717 battery tester and analyzer	*WH58.30-Z-1008-09A
2	Connect up STAR DIAGNOSIS (0100) to data link connector (X11/4).
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
		STAR DIAGNOSIS diagnosis system	*WH58.30-Z-1048-13A
	Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running	Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
3	Check alternator using STAR DIAGNOSIS (0100)	Only perform tests when engine at its normal operating temperature. Checking is menu-assisted Engine control unit Actuations Alternator diagnosis
		STAR DIAGNOSIS diagnosis system	*WH58.30-Z-1048-13A
4	Disconnect STAR DIAGNOSIS (0100).

COMMERCIALLY AVAILABLE TOOLS

Number	Designation
WH58.30-Z-1008-09A	Battery tester and analyzer
WH58.30-Z-1048-13A	STAR DIAGNOSIS diagnosis system, Compact Passenger Car	6511 1801 00