Remove/install spark plugs - AR15.12-P-1010SMG

Engine 156 in model 216, 221 

Shown on right cylinder bank 

Fig 1: Identifying Spark Plugs Remove/Install Component (Shown On Right Cylinder Bank)

Courtesy of MERCEDES-BENZ USA

	Remove/install
	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
	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
	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-0002-01D
	Risk of injury  caused by fingers being jammed or pinched when removing, installing or aligning hoods, doors, trunk lid/rear-end door or sliding roof.	No parts of the body or limbs should be within the operating area when the components are moving.	AS00.00-Z-0011-01A
1	Open engine hood and raise to vertical position
2	Remove air filter housing		AR09.10-P-1150SMG
3	Remove ignition coils		AR15.12-P-2003SMG
		Screw/bolt, ignition coil to cylinder head cover	*BA15.10-P-1001-04B
4	Remove spark plugs (R4) from the cylinder heads	Spark plug to cylinder head	*BA15.10-P-1001-01H
5	Install in the reverse order
	Check
	Risk of accident  from vehicle starting off by itself when engine running. Risk of injury  (bruises and burns) resulting from working on the engine while it is being started or when it is running.	Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
6	Carry out an engine test run