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

Engine 256.9 in model 167, 213, 222, 238, 257, 290

Shown on engine 256.9 in model 222.0

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
	Remove
1	Remove ignition coils.
		Engine 256.9 in model 167	AR15.12-P-2003MSC
		Engine 256.9 in model 213, 238, 257, 290	AR15.12-P-2003MSA
		Engine 256.9 in model 222	AR15.12-P-2003MRT
	Clean
2	Use compressed air to blow out any dirt residue in the spark-plug recesses.,	Set of protective covers	Fig 1
		Record plug	Fig 3
	Remove
3	Unscrew spark plugs (1) using spark plug wrench (01) from cylinder head.	Spark plug wrench	Fig 2
	Install
4	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
5	Check the spark plug connectors (2), ignition coils and ignition lines for damage, deformation and crack formation.	If problems occur, ↓ rectify the problems. After obtaining special order.
	Install
6	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
7	Install ignition coils.
		Engine 256.9 in model 167	AR15.12-P-2003MSC
		Engine 256.9 in model 213, 238, 257, 290	AR15.12-P-2003MSA
		Engine 256.9 in model 222	AR15.12-P-2003MRT