Remove/install ignition coils

AR15.12-S-2003EG

Remove/install ignition coils

18.11.2019

Model

447, 448 with engine 274

1

Screw

T1/11

Cylinder 1 ignition coil

T1/13

Cylinder 3 ignition coil

2

Electrical connector

T1/12

Cylinder 2 ignition coil

T1/14

Cylinder 4 ignition coil

3

Spark plug connector

 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

 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

Topical note

Notes on avoiding damage to ignition system

AH15.10-P-0002-01V

 

Remove/install

1

Switch off ignition

2

Remove air filter housing

AR09.10-S-1150EG

3

Remove trim panel of cylinder head cover

AR01.20-S-5015EG

4

Remove bolt (1)

 Bolt, ignition coil to cylinder head cover

*BA15.10-N-1002-01D

5

Remove cylinder 1 ignition coil (T1/11), cylinder 2 ignition coil (T1/12), cylinder 3 ignition coil (T1/13) and cylinder 4 ignition coil (T1/14) upwards



Service Information: Spark plug connector grease

SI15.10-P-0004A

 The respective ignition coil and respective spark plug connectors (3) create a unit and can therefore only be removed and replaced together.

Spark plug connector grease

*BR00.45-Z-1102-06A

6

Separate electrical connectors (2)

7

Remove cylinder 1 ignition coil (T1/11), cylinder 2 ignition coil (T1/12), cylinder 3 ignition coil (T1/13) and cylinder 4 ignition coil (T1/14)



Check

8

Check cylinder 1 ignition coil (T1/1), cylinder 2 ignition coil (T1/2), cylinder 3 ignition coil (T1/3) and cylinder 4 ignition coil (T1/4) and associated spark plug connectors (3) for damage

 Replace according to condition.

9

Install in the reverse order

10

Connect diagnostic system, read out fault memory and clear if necessary



Connect STAR DIAGNOSIS and read out fault memory

AD00.00-S-2000-04E

 Ignition system

Number

Designation

Engine 274

BA15.10-N-1002-01D

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