Remove/install ignition coils - AR15.12-P-2003MMI

ENGINES 152.9 in MODEL 172.4 

Fig 1: Identifying Ignition Coils Remove/Install Components

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 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
	Notes on avoiding damage to ignition system		AH15.10-P-0002-01V
		The ignition coil (T1/1 to T1/8) and spark plug connector (a) create a unit and can therefore only be removed and exchanged together.
1	Switch off ignition
2	Remove air filter housing (2).		AR09.10-P-1150MMI
3	Remove soundproofing on cylinder head covers
4	Disconnect connector (3) from ignition coils (T1/1 to T1/8)
5	Remove bolts (5) of ignition coils (T1/1 to T1/8)		*BA15.10-P-1001-04A
6	Pull ignition coils (T1/1 up to T1/8) with spark plug connectors (a) upwards and out
	Checking
7	Check ignition coils (T1/1 up to T1/8) and spark plug connectors (a) for damage and replace if necessary
8	Install in the reverse order
9	Read out fault memory with STAR DIAGNOSIS and erase if necessary		AD00.00-P-2000-04A

IGNITION COIL

Number	Designation		Engine 152
BA15.10-P-1001-04A	Screw/bolt, ignition coil to cylinder head cover	Nm	9