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Home >> Mercedes Benz >> 2017 >> GLC300 Base >> Repair and Diagnosis >> Engine Performance >> Tune-Up >> Electrical System - Engine - 253 Chassis >> Testing & Repair >> Remove/Install Ignition Coils Of Left Cylinder Bank >> Remove/Install Ignition Coils Of Left Cylinder Bank - AR15.12-P-2008MNG

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

Engine 177 in model 253 

G12817181Courtesy 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
CAUTION Risk of injury  caused by scraping or cutting body parts on sharp vehicle parts Always wear protective gloves when working on or near sharp and non-deburred vehicle parts. Deburr repair panels. AS00.00-Z-0017-01A
  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
  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
  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 
REMOVINGINSTALLING Remove/install     
1 Remove left-hand air filter housing   AR09.10-P-1151MNG
2 Release and disconnect electrical connector (1) of the ignition coil for cylinders 5+6 (T4/2)    
3 Remove screw/bolts (2) TORQUE SPECIFICATION Bolt, ignition coil to cylinder head cover *BA15.10-P-1001-04D 
4 Detach ignition coil for cylinders 5+6 (T4/2) upward and remove IMPORTANT The ignition coil for cylinders 5+6 (T4/2) and the spark plug connectors form a single unit and can be removed only together.  
5 Unclip oxygen sensor connector bracket from crash plate    
6 Release and disconnect electrical connector (3) of the ignition coil for cylinders 7+8 (T4/3)    
7 Remove screw/bolts (4) TORQUE SPECIFICATION Bolt, ignition coil to cylinder head cover *BA15.10-P-1001-04D 
8 Remove ignition coil for cylinders 7+8 (T4/3) upward and remove IMPORTANT The ignition coil for cylinders 7+8 (T4/3) and the spark plug connectors form a single unit and can be removed only together.  
9 Check ignition coil for cylinders 5+6 (T4/2) and check ignition coil for cylinders 7+8 (T4/3) for damage If a problem arises

replace ignition coil for cylinders 5+6 (T4/2) or ignition coil for cylinders 7+8 (T4/3).
 
10 Discharge approx. Apply about 1 g of spark plug connector grease to the spark plug connector NOTES Apply spark plug connector grease to reduce pull-off and attachment forces
Spark plug connectors will otherwise be damaged during next removal.
 
    Spark plug connector grease *BR00.45-Z-1102-06A 
11 Install in the reverse order    
12 Read out and erase fault memory    
REFER TO SELF-DIAGNOSTIC SYSTEMS     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
13 Perform an engine test run and check engine for proper function    
IGNITION COIL

Number Designation Engine 177
BA15.10-P-1001-04D 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