Replace spark plugs - AP15.10-P-1580CWF

ENGINE 274 IN MODEL 172, 204, 205, 207, 212, 218 

Shown on model 204 

Fig 1: Identifying Spark Plug And Wrench - Shown On Model 204

Courtesy of MERCEDES-BENZ USA

Shown on ignition coil in engine 157.980 

Fig 2: Identifying Spark Plug Connector And Rubber Lip

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  caused by contact with parts conducting high voltages.	Do not touch parts which conduct high voltages. Persons who have electronic implants (e.g. cardiac pacemakers) may not perform any work on the ignition system.	AS15.10-Z-0001-01A
	Information on avoiding damage when replacing spark plugs		AH15.10-P-0002-02A
	Preparatory activity
1	Open engine hood and raise to vertical position	Model 172, 204, 205, 207, 212, 218
		Model 204.3, 207, 212 Model 204.3, 207, 212 with code U60 (Active engine hood (pedestrian protection)) Moving the engine hood to the vertical position:  Detach left and right clamping levers at the upper left and right hinges.	AR88.40-P-1000EW
	Remove
2	Remove ignition coils
		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	AR15.12-P-2003MRA
		Engine 274 in model 212, 218	AR15.12-P-2003MRS
	Clean
3	Blow out any dirt residue in the spark-plug recesses using compressed air	Record plug	Figure
		Set of protective covers	Figure
	Remove
4	Remove spark plugs (1) using spark plug wrench (01) from cylinder head	Spark plug wrench	Fig 5
	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 5
	Check
6	Check spark plug connector (2), ignition coils and ignition lines for damage, deformation and crack formation	If there are problems: ↓ Rectify problem subject to separate repair order.
	Install
7	Grease rubber lips (3) of spark plug connectors (2) using spark plug connector grease before installation	Spark plug connector grease	*BR00.45-Z-1102-06A
8	Install ignition coils
		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	AR15.12-P-2003MRA
		Engine 274 in model 212, 218	AR15.12-P-2003MRS
	Finishing activity
9	Close engine hood	Model 172, 204, 205, 207, 212, 218
		Model 204.3, 207, 212 Model 204.3, 207, 212 with code U60 (Active engine hood (pedestrian protection)) Close engine hood:  Mount left and right clamping levers at the upper left and right hinges.	AR88.40-P-1000EW

Fig 3: Identifying Set Of Protective Covers (001 589 01 91 00)

Courtesy of MERCEDES-BENZ USA

Fig 4: Identifying Record Plug (129 589 00 91 00)

Courtesy of MERCEDES-BENZ USA

Fig 5: Identifying Spark Plug Wrench (278 589 00 09 00)

Courtesy of MERCEDES-BENZ USA