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

ENGINES 272 in MODEL 204 

ENGINES 272, 273 in MODEL 207 

Shown on engine 272 

Fig 1: Identifying Ignition Coils Remove/Install Components - Shown On Engine 272
G09990116Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install     
DANGER Risk of death  caused by contact with parts conducting high voltages. Do not come into contact with parts that are under high voltage. Persons who wear electronic implants (e.g. heart pacemakers) should never perform any work on the ignition system. AS15.10-Z-0001-01A
NOTES Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
NOTES Notes on avoiding damage to ignition system   AH15.10-P-0002-01V
1 Remove air filter housing   AR09.10-P-1150CV
2 Disconnect electrical connectors from ignition coils (T1/1 to T1/6 and T1/1 to T1/8)    
3 Remove bolts (1) of ignition coils (T1/1 to T1/6 and T1/1 to T1/8) TORQUE SPECIFICATION *BA15.10-P-1001-04A 
4.1 Pull ignition coils (T1/1 to T1/6 and T1/1 to T1/8) with spark plug connectors (a) upwards Except engine 272.982/984  
4.2 Detach ignition coil (T1/1 to T1/6) upwards Engine 272.982/984  
5 Detach ignition line from ignition coils (T1/1 to T1/6) Engine 272.982/984  
INSPECT Checking     
6 Check spark plug connector (a) for cylinder 1 to 6 ignition coils (T1/1 up to T1/6 up to T1/1 as of T1/8) Except engine 272.982/984
If damaged replace spark plug connector (a).
 
7 Install in the reverse order    
8 Check for correct routing of ignition lines Engine 272.982/984 AR15.12-P-1010-01CDE
9 Read out fault memory with STAR DIAGNOSIS    
REFER TO SELF-DIAGNOSTIC SYSTEMS Connect STAR DIAGNOSIS and read out fault memory AD00.00-P-2000-04A
IGNITION COIL

Number Designation Engine 272 Engine 273
BA15.10-P-1001-04A Bolt, ignition coil to cylinder head cover Nm 9 9