Remove/install ignition coils (Engine 272, 273) - AR15.12-P-2003GZA

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ENGINE 272, 273 in MODEL 164, 251

Engine 272

Fig 1: Identifying Ignition Coils Remove/Install Components (Engine 272)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Engine 273

Fig 2: Identifying Ignition Coils Remove/Install Components (Engine 273)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

	Remove/install
	Risk of death caused by contact with parts conducting high voltages.	Do not touch parts which conduct high voltages. Persons who wear electronic implants (e.g. heart pacemakers) should never perform any work on the ignition system	AS15.10-Z-0001-01A
	Risk of injury to skin and eyes caused by handling hot or glowing objects.	Wear safety gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Notes on avoiding damage to ignition system		AH15.10-P-0002-01V
1	Remove air filter housing		AR09.10-P-1150GZA
2	Remove bolts (1) for ignition coils (T1/1 to T1/6 and T1/1 to T1/8)		*BA15.10-P-1001-04A
3	Pull ignition coils (T1/1 to T1/6 and T1/1 to T1/8) with spark plug connectors (a) upwards and out
4	Disconnect electrical connectors of ignition coils (T1/1 to T1/6 and T1/1 to T1/8)
5	Install in the reverse order
6	Connect STAR DIAGNOSIS and read fault memory	Stored faults which may be caused by disconnecting cables or by simulation during test operations, must be erased in the fault memory after completing the work.

IGNITION COIL

Number	Designation		Engine 272	Engine 273
BA15.10-P-1001-04A	Bolt, ignition coil to cylinder head cover	Nm	9	9