Remove/install AdBlue(R) metering valve

AR49.20-P-2000MFE

Remove/install AdBlue(R) metering valve

23.08.2019

Engine

608 in model 118, 177, 247

Shown on model 177

1

AdBlue®additive line

5

Hose clamps

2

Electrical connector

6

Clip

3

Electrical line

7

Thermal insulation

4

Coolant hoses

Y129

AdBlue® metering valve

 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

 Warning

Risk of burn injuries and scalding when working on AdBlue(R) lines and the component parts attached to them. Risk of injury to skin and eyes when handling AdBlue(R). Risk of poisoning caused by swallowing AdBlue(R)

Pour AdBlue® only into suitable containers. Wait until the pressure is released before starting any work on the exhaust aftertreatment system.

AS49.20-Z-0002-01A

 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

 Warning

Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant.

Do not open cooling system unless coolant temperature is below 90 °C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers.
Wear protective gloves, protective clothing and safety glasses.

AS20.00-Z-0001-01A

Topical note

Notes on coolant

AH20.00-N-2080-01A

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

Notes on use, material properties and handling of AdBlue®

AH14.40-N-0001-01A

Notes on safety-relevant components

AH00.00-Z-0019-01A

 

Remove/install

1

Switch off ignition and store transmitter key outside of transmitter range (min. 2 m).

2

Remove upper engine cover.



AP01.10-P-2405-01B

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

3

Open thermal insulation (7).

4

Unlock AdBlue® additive line (1) from AdBlue® metering valve (Y129), remove it, and collect escaping AdBlue® with a suitable container.

5

Clean the connection of the AdBlue® additive line (1) with a lint-free rag.

6

Seal openings on AdBlue® additive line (1) and on the AdBlue® metering valve (Y129) with suitable stop plugs.

 Record plug

*129589009100

7

Release and disconnect the electrical connector (2).

8

Unclip the electrical connector of the electrical line (3) from the engine.

 Clip remover

*452589016300

9

Slowly unscrew the cap for the coolant expansion reservoir and reduce the overpressure.

10

Disconnect coolant hoses (4).

 Clamp

*000589403700

11

Remove coolant hoses (4) at AdBlue® metering valve (Y129) and collect escaping coolant with suitable container.

 Installation: Replace clamps (5).

 Hose clamp pliers

*454589003700

12

Seal openings at AdBlue® metering valve (Y129) with suitable stop plugs.

 Record plug

*129589009100

13

Release clamp (6) and remove AdBlue® metering valve (Y129) upwards.

 Installation: Replace clamp (6) and seal.

 Bolt, clamp for AdBlue® metering valve to catalytic converter

*BA49.20-P-1001-03B

14

Clean the seat of the AdBlue® metering valve (Y129) in the exhaust gas aftertreatment unit with a lint-free rag.

15

Seal opening at exhaust gas aftertreatment unit with protective cover.

 Set of protective caps

*001589009100

16

Install in the reverse order.



Check

17

Check engine cooling system for leak tightness.

AR20.00-P-1010MFE

18

Connect vehicle diagnosis system, read out fault memory and clear if necessary.



AD00.00-P-2000-06MFA

19

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

20

Install upper engine cover.



AP01.10-P-2405-01B

 Exhaust aftertreatment

Number

Designation

Engine 608

BA49.20-P-1001-03B

Bolt, clamp for AdBlue® metering valve to catalytic converter

Nm

8