Remove/install sensor unit of temperature sensors

AR49.20-P-0015MFF

Remove/install sensor unit of temperature sensors

12.12.2019

Engine

654 in model 118, 177, 247

Modification notes

09.12.2019

Document completely revised.

6

Bracket

7

Electrical line

B16/19

Temperature sensor upstream of oxidation catalytic converter

B19/11

Temperature sensor upstream of turbocharger

1

Bracket

2

Electrical connector

3

Screw

4

Bracket

5

Electrical connector

8

Electrical line

9

Electrical line

10

Bracket

12

Bolts

13

Engine support

B19/8

Temperature sensor downstream of oxidation catalytic converter

B175

Temperature sensors sensor unit

4

Bracket

11

Nut

13

Engine support

14

Coolant line

15

Bracket

16

Screw

B28/8

Differential pressure sensor (DPF)

 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

 Warning

Risk of burns and injury when working on the diesel particulate filter and health hazard from inhalation of soot particles

Wear protective gloves, safety glasses and respiratory protection.

AS49.20-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

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

Note on calculation of tightening torque when using insertion or socket tools with various effective lengths

AH00.00-P-0015-01CW

 

Remove/install

1

Remove upper engine cover.

AR01.10-P-2405MFF

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

2

Remove battery carrier.

AR54.10-P-0028MFA

3

Unclip electric line (8) from the bracket (10).


To not subject electric line (8) to tension, crush it or kink it.
This causes damage to the electric line (8) and impairs its function.

4

Remove union nut and remove temperature sensor upstream of the oxidation catalytic converter (B16/19) from the exhaust gas aftertreatment unit.

 Union nut, temperature sensor to catalytic converter

*BA07.04-P-1002-02A

 Box wrench bit

*000589690300

5

Seal opening in the exhaust gas aftertreatment unit with a suitable stop plug.

 Record plug

*129589009100

6

Unclip electric line (7) from the brackets (6).


To not subject electric line (7) to tension, crush it, or kink it.
This causes damage to the electric line (7) and impairs its function.

7

Remove union nut and remove temperature sensor upstream of the exhaust gas turbocharger (B19/11) from the exhaust gas turbocharger.

 Accessibility to the temperature sensor upstream of the exhaust gas turbocharger (B19/11) from the top between the firewall and exhaust gas aftertreatment unit.

 Installation: Tighten union nut of the temperature sensor upstream of the exhaust gas turbocharger (B19/11) with  engine mount wrench set in combination with torque tool set.

 Installation: Commercially available devices/tools
Torque tool set

 Union nut, temperature sensor to ATL

*BA07.04-P-1015-02A

 Engine mount wrench set

*001589011600

8

Seal opening in the exhaust gas aftertreatment unit with a suitable stop plug.

 Record plug

*129589009100

9

Remove right engine mount.

AR22.10-P-1102MFF

10

Release and disconnect the electrical connector (5).

11

Remove nut (11).

 Nut, differential pressure sensor for diesel particulate filter to bracket

*BA07.04-P-1007-02A

12

Remove DPF differential pressure sensor (B28/8) from bracket (4) and place to one side.

13

Remove screw (3) and remove bracket (4).

 M61

*BA00.10-P-1002-04A

14

Unclip electric line (9) from the brackets (1, 10).


To not subject electric line (9) to tension, crush it or kink it.
This causes damage to the electric line (9) and impairs its function.

15

Unscrew screws (12) and remove engine carrier (13).

Topical note

Notes on threaded connections fastened using a tightening angle-based tightening process

AH00.00-P-0020-01A

 Screw, engine support to cylinder head (transverse installation)

*BA22.10-P-1009-02A

16

Remove coolant line (14) from the bracket (15).

17

Remove screw (16) and remove bracket (15).

 M61

*BA00.10-P-1002-04A

18

Remove union nut and remove temperature sensor downstream of the oxidation catalytic converter (B19/8) from the exhaust gas aftertreatment unit.

 Union nut, temperature sensor to catalytic converter

*BA07.04-P-1002-02A

 Box wrench bit

*000589690300

19

Seal opening in the exhaust gas aftertreatment unit with a suitable stop plug.

 Record plug

*129589009100

20

Release and disconnect electrical connector (2).

21

Unclip sensor unit of the temperature sensors (B175) and remove.


Do not crush or kink or subject lines to tension.
This leads to damage to the lines and impairs their function.

22

Install in the reverse order.



Check

23

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

24

Perform engine test run. While doing so, check engine for proper operation and leak tightness.

25

Install upper engine cover.

AR01.10-P-2405MFF

 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

 Sensors

Number

Designation

Engine 654

BA07.04-P-1002-02A

Union nut, temperature sensor to catalytic converter

Nm

45

 Sensors

Number

Designation

Engine 654

BA07.04-P-1007-02A

Nut, differential pressure sensor for diesel particulate filter to bracket

Nm

8

 Sensors

Number

Designation

Engine 654

BA07.04-P-1015-02A

Union nut, temperature sensor to ATL

Nm

45

 Engine support (engine side)

Number

Designation

Engine 654

BA22.10-P-1009-02A

Screw, engine support to cylinder head (transverse installation)

Stage 1

Nm

20

Stage 2

°

90