Remove/install catalytic converter

AR49.20-P-0100MFC

Remove/install catalytic converter

09.12.2019

Engine

260 in model 118, 177, 247

Modification notes

06.12.2019

Document completely revised.

Shown on model 177 with engine 260 without code M016 (performance-enhanced engine)

2

Nuts

4

Bracket

3

Catalytic converter

5

Bolts

Shown on model 177 with engine 260 without code M016 (performance-enhanced engine)

6

Bottom cover

9

Bolts

7

Engine wiring harness

10

Screw

8

Connecting carrier

Shown on model 177 with engine 260 without code M016 (performance-enhanced engine)

3

Catalytic converter

15

Bolts

11

Coolant hose

16

Bracket

12

Bolts

17

Bolts

13

Bracket

M13/7

Transmission oil cooling coolant circulation pump

14

Bolts

 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

 Warning

Risk of burn injuries, suffocation and poisoning when working on the exhaust system and the components connected to it. Risk of suffocation and risk of poisoning caused by inhalation of gaseous and solid components of the exhaust. Risk of poisoning caused by skin contact with solid components of the exhaust.

Wear protective clothing and safety glasses. Use the extraction system. Move people out of the hazard area.

AS49.00-Z-0001-01A

 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 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

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

 

Remove/install

1

Remove fan unit.

AR20.40-P-5050MFD

2

Attach radiator guard plate.



WF58.50-P-0110-01A

3

Remove inerting line from catalytic converter (3) and place to one side.

Engine 260 in model 118, 177, 247
with code 2U8 (Alternative refrigerant)

AR86.10-P-0119MFC


Do not crush or kink inerting line or subject it to tension.
This will result in damage to the inerting line and can impair its functional capability.

4

Remove heat shield from exhaust gas turbocharger.

AR09.40-P-6045MFC

5

Remove nuts (2) from catalytic converter (3).

 Clamp/nut, front exhaust system to exhaust gas turbocharger

*BA49.10-P-1001-02Q

6

Remove screws (5) and remove holder (4).

 Bolt, upper front exhaust system holder to lifting eye/exhaust system

*BA49.10-P-1002-02Q

7

Remove lambda sensor downstream of catalytic converter (G3/1).

AR07.04-P-0085MFC

8

Remove cover (6) at bottom of bumper.

9

Expose engine wiring harness (7) on connecting carrier (8) and mounting support (arrows).

10

Remove the bolt (10).

11

Remove screws (9) on left and right of connecting carrier (8) and remove connecting carrier (8).

 Installation: Ensure that rubber mounts on cooler and washer fluid reservoir are seated correctly.

 Aid of helper required.

 Bolt, connecting carrier to front axle carrier/radiator support

*BA62.30-P-1003-02O

 Bolt, radiator support to mounting support

*BA62.30-P-1004-02O

12

Release and disconnect electrical connector of transmission oil cooling coolant circulation pump (M13/7).

13

Unclip coolant hose (11) from refrigerant compressor and brackets (13) of transmission oil cooling coolant circulation pump (M13/7).

14

Remove screws (12) of holders (13) of transmission oil cooling coolant circulation pump (M13/7).

15

Place transmission oil cooling coolant circulation pump (M13/7) to one side together with engine wiring harness (7) and fix in place.

16

Remove right front axle shaft.

AR33.30-P-0620MFC

17

Remove heat shield of front axle drive shaft.

AR49.00-P-1000-05MFC

 Bolt, heat shield to engine carrier/crankcase/oil pan/cylinder head

*BA22.10-P-1002-02E

18

Remove screws (14) at connection between catalytic converter (3) and exhaust system.

 Clamp, rear exhaust system to center exhaust system

*BA49.10-P-1008-02Q

19

Remove screws (15) at rear holder (16) on oil pan and remove rear holder (16).

 Bolt, lower holder for front exhaust system to oil pan/exhaust system

*BA49.10-P-1005-02Q

20

Remove screws (17) at front of crankcase.

 Stud bolt/bolt, front exhaust system to crankcase

*BA49.10-P-1003-02Q

21

Remove catalytic converter (3) downwards.

 Installation: Install catalytic converter (3) such that it is free of tension.

 Aid of helper required.

 Installation: Replace seal.

22

Install in the reverse order.



Check

23

Check installation position and unobstructed movement of exhaust system and correct if necessary.

 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

24

Perform engine test run and check exhaust system for leak tightness in area of catalytic converter (3) while doing so.

 Engine support (engine side)

Number

Designation

Engine 260

BA22.10-P-1002-02E

Bolt, heat shield to engine carrier/crankcase/oil pan/cylinder head

M6

Nm

8

 Exhaust system

Number

Designation

Model 118 with engine 260

Model 177 with engine 260

BA49.10-P-1001-02Q

Clamp/nut, front exhaust system to exhaust gas turbocharger

Nm

30

30

 Exhaust system

Number

Designation

Model 247 with engine 260

BA49.10-P-1001-02Q

Clamp/nut, front exhaust system to exhaust gas turbocharger

Nm

30

 Exhaust system

Number

Designation

Model 118 with engine 260

Model 177 with engine 260

BA49.10-P-1002-02Q

Bolt, upper front exhaust system holder to lifting eye/exhaust system

Nm

25

25

 Exhaust system

Number

Designation

Model 247 with engine 260

BA49.10-P-1002-02Q

Bolt, upper front exhaust system holder to lifting eye/exhaust system

Nm

25

 Exhaust system

Number

Designation

Model 118 with engine 260

Model 177 with engine 260

BA49.10-P-1003-02Q

Stud bolt/bolt, front exhaust system to crankcase

Nm

25

25

 Exhaust system

Number

Designation

Model 247 with engine 260

BA49.10-P-1003-02Q

Stud bolt/bolt, front exhaust system to crankcase

Nm

25

 Exhaust system

Number

Designation

Model 118 with engine 260

Model 177 with engine 260

BA49.10-P-1005-02Q

Bolt, lower holder for front exhaust system to oil pan/exhaust system

Nm

25

25

 Exhaust system

Number

Designation

Model 247 with engine 260

BA49.10-P-1005-02Q

Bolt, lower holder for front exhaust system to oil pan/exhaust system

Nm

25

 Exhaust system

Number

Designation

Model 118 with engine 260

Model 177 with engine 260

BA49.10-P-1008-02Q

Clamp, rear exhaust system to center exhaust system

Nm

23

23

 Exhaust system

Number

Designation

Model 247 with engine 260

BA49.10-P-1008-02Q

Clamp, rear exhaust system to center exhaust system

Nm

23

 Frond end with front reinforcement

Number

Designation

Model 118

Model 177

BA62.30-P-1003-02O

Bolt, connecting carrier to front axle carrier/radiator support

M8

Nm

16

16

 Frond end with front reinforcement

Number

Designation

Model 247

BA62.30-P-1003-02O

Bolt, connecting carrier to front axle carrier/radiator support

M8

Nm

16

 Frond end with front reinforcement

Number

Designation

Model 118

Model 177

BA62.30-P-1004-02O

Bolt, radiator support to mounting support

M8

Nm

16

16

 Frond end with front reinforcement

Number

Designation

Model 247

BA62.30-P-1004-02O

Bolt, radiator support to mounting support

M8

Nm

16