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

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ENGINES 272, 273 in MODEL 212 

Engine 272 

Fig 1: Ignition Coils Remove/Install Components - Engine 272
G09975054Courtesy of MERCEDES-BENZ USA

Engine 273 

Fig 2: Ignition Coils Remove/Install Components - Engine 273
G09975055Courtesy 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 Switch off ignition, remove ignition key    
2 Remove air filter housing   AR09.10-P-1150EWS
3 Remove bolts (1) of ignition coils for cylinder 1 to cylinder 6 or 8 (T1/1 to T1/6 or T1/8) TORQUE SPECIFICATION *BA15.10-P-1001-04A 
4 Disconnect electrical connectors on ignition coils for cylinder 1 to cylinder 6 or 8 (T1/1 to T1/6 or T1/8)    
5 Detach ignition coils for cylinder 1 to cylinder 6 or 8 (T1/1 to T1/6 or T1/8) upwards    
6 Detach ignition coil connector    
7 Remove spark plug connector Engine 272.983 AR15.12-P-1010-01CDE
SPECIAL TOOL Fig 3
INSPECT Checking     
8 Check spark plug connectors, ignition coil connectors and ignition lines IMPORTANT Check for damage, deformation and crack formation, replace if necessary.  
9 Install in the reverse order    
10 Check for correct routing of ignition lines Engine 272.983 AR15.12-P-1010-01CDE
11 Read out fault memory using STAR diagnosis system    
IGNITION COIL

Number Designation Engine 272 Engine 273
BA15.10-P-1001-04A Bolt, ignition coil to cylinder head cover Nm 9 9
Fig 3: Identifying Puller (272 589 01 33 00)
G09975056Courtesy of MERCEDES-BENZ USA