Remove/install ignition coils

AR15.12-P-2003MFD

Remove/install ignition coils

20.11.2019

Engine

282 in model 118, 177, 247

Shown on model 177

1

Engine air intake duct downstream of the air filter

T1/1

Cylinder 1 ignition coil

2

Charge air pipe

T1/2

Cylinder 2 ignition coil

3

Electrical connector

T1/3

Cylinder 3 ignition coil

4

Bolts

T1/4

Cylinder 4 ignition coil

 Danger

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

 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

Topical note

Notes on avoiding damage to ignition system

AH15.10-P-0002-01V

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A

 

Remove/install

1

Switch off ignition and store transmitter key outside of transmitter range (min. 2 m).

2

Remove upper engine cover.



AP01.10-P-2405-01D

 Installation: Only install upper engine cover after the leak test.

3

Remove engine air intake duct downstream of the air filter (1).

Only when removing of the ignition coil of cylinder 4 (T1/4).

AR09.10-P-8130MFD

4

Remove charge air pipe (2) from the exhaust gas turbocharger to the charge air cooler.

Only when removing the ignition coils for cylinders 3 – 4 (T1/3 to T1/4).

AR09.41-P-1332MFD

5

Release and disconnect electrical connectors (3).

6

Unscrew screw/bolts (4).

 Screw/bolt, ignition coil to cylinder head cover

*BA15.10-P-1001-04A

7

Remove ignition coils for cylinders 1 – 4 (T1/1 to T1/4) with the spark plug connectors.

 Installation:
To reduce the force required for connection and disconnection of the spark plug connector, apply approx. 1 g of spark plug connector grease before installation.
Otherwise the spark plug connector will be damaged when removed again.

Spark plug connector grease

*BR00.45-Z-1102-06A

8

Check ignition coils for cylinders 1 – 4 (T1/1 to T1/4) and the spark plug connectors for damage.

If problems occur,



Replace corresponding components.

9

Install in the reverse order.



Check

10

Read out and delete fault memory.



AD00.00-P-2000-06MFA

 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

11

Conduct engine test run while checking for proper operation of the engine.

12

Install upper engine cover.



AP01.10-P-2405-01D

 Ignition coil

Number

Designation

Engine 282

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