Remove/install ignition coils of left cylinder bank

AR15.12-P-2008MNB

Remove/install ignition coils of left cylinder bank

18.11.2019

Engine

178 in model 190

8

Wiring harness

11

Screw

13

Passage grommet

9

Sidewall

12

Nut

34

Seal

10

Vacuum line

21

Bolts

22

Vent line

24

Electrical connector

25

Electrical connector

28

Bolts

29

Bolts

T4/2

Cylinders 5+6 ignition coil

T4/3

Cylinders 7+8 ignition coil

2

Bolts

3

Bracket

4

Engine wiring harness

18

Electrical connector

20

Screw

B163/5

Left gasoline particulate filter differential pressure sensor

 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 caused by vehicle slipping or toppling off of the lifting platform.

Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.

AS00.00-Z-0010-01A

 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 through contamination and foreign objects

AH00.00-P-5000-01A

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

 

Remove/install

1

Open hood.

AR88.40-P-1000RG

2

Remove upper engine cover.

3

Remove seal (34).

4

Unclip wiring harness (8) from side wall (9).

5

Remove vacuum line (10) from brake booster, remove in upward direction and seal openings with suitable stop plugs.

 Record plug

*129589009100

6

Remove screws (11).

 Bolt, partition wall to body

*BA68.74-P-1001-01D

7

Unscrew nut (12), lift side wall (9) and remove feed-through grommet (13).

 Nut, partition wall to body

*BA68.74-P-1002-01D

8

Remove side wall (9) in upward direction.

9

Unclip vacuum line and engine wiring harness (4) from bleed line (22).

10

Release and disconnect electrical connector (18) and press engine wiring harness (4) to the side.

11

Slightly lift soundproofing on left rail.

12

Remove screw (20) and slightly lift engine wiring harness (4).

 Bolt, engine wiring harness to cylinder head cover

*BA15.18-P-1001-01G

13

Unscrew screws (21), remove bleed line (22) and seal openings with suitable stop plugs.

 Bolt, vent line to cylinder head cover/turbocharger

*BA01.20-P-1001-01J

 Record plug

*129589009100

14

Remove screws (2) and place bracket (3) with left gasoline particulate filter differential pressure sensor (B163/5) and connected pressure hoses to one side.

Only when removing the ignition coil (T4/3).

 M61

*BA00.10-P-1002-04A

15

Release and disconnect electrical connectors (24, 25).

16

Unscrew respective screws (28, 29) and remove respective ignition coil (T4/2, T4/3) in upward direction.

 Installation:
To reduce the draw-off and insertion forces, apply spark plug connector grease before installation of spark plug connector.
Otherwise the spark plug connector will be damaged when removed again.

 Installation: Approx. Fill 1 g of spark plug connector grease into the spark plug connector.

Spark plug connector grease

*BR00.45-Z-1102-06A

 Bolt, ignition coil to cylinder head cover

*BA15.10-P-1001-04D

17

Install in the reverse order.

18

Read out and delete fault memory.



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

19

Perform an engine test run and check the engine for proper function.

 Metric screws/bolts and nuts as per MBN 10 105, 10 143

Number

Designation

8.8

10.9

BA00.10-P-1002-04A

M61

Nm

9

13

 Crankcase ventilation system, cylinder head cover

Number

Designation

Engine 178

BA01.20-P-1001-01J

Bolt, vent line to cylinder head cover/turbocharger

Nm

9

 Ignition coil

Number

Designation

Engine 178

BA15.10-P-1001-04D

Bolt, ignition coil to cylinder head cover

Nm

9

 Engine wiring harness

Number

Designation

Engine 178

BA15.18-P-1001-01G

Bolt, engine wiring harness to cylinder head cover

Nm

9

 Partition wall

Number

Designation

Model 190

BA68.74-P-1001-01D

Bolt, partition wall to body

Nm

7

 Partition wall

Number

Designation

Model 190

BA68.74-P-1002-01D

Nut, partition wall to body

Nm

8

Repair materials

Number

Designation

Order number

BR00.45-Z-1102-06A

Spark plug connector grease

A 002 989 80 51