Replace Spark Plugs - AP15.10-P-1580CWF

Engine 274 in model 167, 172, 204, 205, 207, 212, 213, 218, 238, 253

Shown on engine 274.9 in model 204.0

Courtesy of MERCEDES-BENZ USA

Shown on ignition coil in engine 157.980

Courtesy of MERCEDES-BENZ USA

	Risk of injury . Skin or eye injuries may result when handling hot or glowing objects.	Wear protective gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
	Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)	Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines.	AS00.00-Z-0035-01A
Notice	Information on avoiding damage when replacing spark plugs		AH15.10-P-0002-02A
	Preparatory activity
1	Open engine hood and position upright.	Engine 274 in model 167, 172, 204, 205, 207, 212, 213, 218, 238, 253
		Engine 274 in model 204.3, 207, 212	AR88.40-P-1000EW
		Engine 274 in model 204.3, 207, 212 with code U60 (Pedestrian protection - Active hood) Moving the engine hood to the vertical position: Left and right tensioning lever at top must be removed from left and right hinge.
	Remove
2	Remove ignition coils.	Engine 274 in model 167, 172, 204, 205, 207, 212, 213, 218, 238, 253
		Engine 274.9 in model 167	AR15.12-P-2003MRM
		Engine 274 in model 172	AR15.12-P-2003MRE
		Engine 274 in model 204, 207	AR15.12-P-2003MR
		Engine 274.9 in model 205, 253	AR15.12-P-2003MRA
		Engine 274 in model 212, 218	AR15.12-P-2003MRS
		Engine 274.9 in model 213, 238	AR15.12-P-2003MRD
	Clean
3	Use compressed air to blow out any dirt residue in the spark-plug recesses.	Record plug	Fig 3
		Set of protective covers	Fig 1
	Remove
4	Unscrew spark plugs (1) using spark plug wrench (01) from cylinder head.	Spark plug wrench	Fig 2
	Install
5	Screw new spark plugs (1) using spark plug wrench (01) into cylinder head.	Spark plug to cylinder head	*BA15.10-P-1001-01C
		Spark plug wrench	Fig 2
	Check
6	Check the spark plug connectors (2), ignition coils and ignition lines for damage, deformation and crack formation.	If problems are determined, ↓ rectify the problems. After obtaining special order.
	Install
7	Apply coating of spark plug connector grease to sealing lips (3) of spark plug connectors (2) before installation.	Spark plug connector grease	*BR00.45-Z-1102-06A
8	Install ignition coils.	Engine 274 in model 167, 172, 204, 205, 207, 212, 213, 218, 238, 253
		Engine 274.9 in model 167	AR15.12-P-2003MRM
		Engine 274 in model 172	AR15.12-P-2003MRE
		Engine 274 in model 204, 207	AR15.12-P-2003MR
		Engine 274.9 in model 205, 253	AR15.12-P-2003MRA
		Engine 274 in model 212, 218	AR15.12-P-2003MRS
		Engine 274.9 in model 213, 238	AR15.12-P-2003MRD
	Finishing activity
9	Close hood.	Engine 274 in model 167, 172, 204, 205, 207, 212, 213, 218, 238, 253
		Engine 274 in model 204.3, 207, 212	AR88.40-P-1000EW
		Engine 274 in model 204.3, 207, 212 with code U60 (Pedestrian protection - Active hood) Close engine hood: The left and right tensioning lever at the top must be mounted onto the left and right hinge.