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Home >> Mercedes Benz >> 2017 >> C300 Base, 2D Convertible >> Repair and Diagnosis >> Engine Performance >> Tune-Up >> Electrical System - Engine - 205 Chassis >> Testing & Repair >> Remove/Install Ignition Coils Of Left Cylinder Bank - AR15.12-P-2008MMV

Remove/Install Ignition Coils Of Left Cylinder Bank - AR15.12-P-2008MMV

Engine 276.8 in model 205 

Engine 276.8 in model 253 

Shown on model 205 with engine 276.8 

Fig 1: Ignition Coils Of Left Cylinder Bank Components Location - Engine 276.8 in model 205
G12937505Courtesy of MERCEDES-BENZ USA
WARNING 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
  Notes on avoiding damage through contamination and foreign objects   AH00.00-P-5000-01A
  Notes on avoiding damage to ignition system   AH15.10-P-0002-01V 
REMOVING Remove     
1 Remove left-hand air filter housing   AR09.10-P-1150MMV
2 Remove soundproofing of left rail    
3 Release and disconnect electrical connections (1)    
4 Remove screw/bolts (2)    
5 Pull ignition coils (3) with spark plug connectors upwards and out. IMPORTANT The ignition coils (3) and the spark plug connector create a unit and can therefore only be removed and replaced together.  
6 Check ignition coils (3) and the spark plug connector for damage If damage is present.

Replace ignition coils (3) and the spark plug connector.
 
INSTALLING Install     
7 Discharge approx. Apply about 1 g of spark plug connector grease to the spark plug connector NOTES To reduce the withdrawal and attachment forces the spark plug connector grease must be applied.
Otherwise the spark plug connectors will be damaged upon renewed removal.
Spark plug connector grease
*BR00.45-Z-1102-06A 
8 Position the ignition coils (3) with spark plug connectors in the spark plug bores    
9 Screw in screw/bolts (2) TORQUE SPECIFICATION Screw/bolt, ignition coil to cylinder head cover *BA15.10-P-1001-04A 
10 Place electrical connections (1) and lock    
11 Install soundproofing of left rail    
12 Install left-hand air filter housing   AR09.10-P-1150MMV
13 REFER TO SELF-DIAGNOSTIC SYSTEMS Read out fault memory using the diagnostic system and clear if necessary   AD00.00-P-2000-04B
WARNING 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
14 Perform an engine test run and check engine for proper function    
IGNITION COIL

Number Designation Engine 276
BA15.10-P-1001-04A Screw/bolt, ignition coil to cylinder head cover Nm 9
REPAIR MATERIALS

Number Designation Order number
BR00.45-Z-1102-06A Spark plug connector grease A 002 989 80 51