Remove/install ignition coils

AR15.12-P-2003MFC

Remove/install ignition coils

12.11.2019

Engine

260 in model 118, 177, 247

Modification notes

08.11.2019

Document completely revised.

Shown on engine without code M016 (performance-enhanced engine)

1

Electrical connector

T1/1

Cylinder 1 ignition coil

T1/3

Cylinder 3 ignition coil

2

Bolts

T1/2

Cylinder 2 ignition coil

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

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

 

Remove/install

1

Remove engine air intake duct downstream of air filter.

AR09.10-P-8130MFC

2

Remove charge air pipe downstream of exhaust gas turbocharger.

Engine 260 in model 118, 177, 247
with code M016 (Uprated engine)

AR09.41-P-1333MFC

3

Release and disconnect the electrical connections (1).

4

Remove screws (2).

 Screw/bolt, ignition coil to cylinder head cover

*BA15.10-P-1001-04A

5

Remove the ignition coils (T1/1, T1/2, T1/3, T1/4) together 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

6

Check the ignition coils (T1/1, T1/2, T1/3, T1/4) and spark plug connectors for damage.

If there are problems,



Replace corresponding components.

7

Install in the reverse order.

8

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

9

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

 Ignition coil

Number

Designation

Engine 260

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