S49.20-A025-79
1 | Metering valve | 5 | Coolant hoses | |
2 | Injection line | 6 | Spring-loaded band-type clamp | |
3 | Electrical connector | 7 | Clip | |
4 | Electrical line |
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. | |
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. | |
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. | |
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. | |
Topical note | Notes on use, material properties and handling of NOx reducing agent | ||
Topical note | Notes on avoiding damage through contamination and foreign objects | ||
Topical note | Information on preventing damage to electronic components due to electrostatic discharge | ||
| Remove/install | ||
1 | Switch off ignition and store transmitter key outside of transmission range (min. 2 m). | ||
2 | Remove injection line (2) from metering valve (1). | For this purpose, release injection line (2). Collect escaping AdBlue® with suitable container. Seal connections. | |
Installation: Clean connection of injection line (2) with lint-free rag. | |||
Record plug | |||
3 | Remove electrical connector (3) from bracket. | Installation: Check retaining clips for damage. | |
If damage is present, | |||
| |||
Replacing retaining clip. | |||
4 | Disconnect electrical connector (3). | ||
5 | Remove electric line (4) from retaining clip. | ||
6 | Clamp off coolant hoses (5). | Clamp | |
7 | Remove coolant hoses (5) from metering valve (1). | Collect escaping coolant using suitable vessel. Seal openings at metering valve (1). | |
Installation: Replace spring bracket clamps (6). | |||
Record plug | |||
Hose clamp pliers | |||
8 | Remove metering valve (1) upwards. | For this purpose, release clamp (7). | |
Installation: Replace clamp (7) and seal. | |||
Screw, metering valve clamp to exhaust gas aftertreatment unit | |||
| Clean | ||
9 | Clean seat of metering valve (1) in exhaust gas aftertreatment unit. | ||
10 | Seal opening at exhaust gas aftertreatment unit. | If additional work will be carried out or metering valve (1) is not immediately reinstalled. | |
Set of protective caps | |||
11 | Install in the reverse order. | ||
12 | Read out fault memory with vehicle diagnosis system. | ||
| Connect STAR DIAGNOSIS and read out fault memory | ||
If stored faults exist | |||
| |||
Erase the fault memory. | |||
13 | Remove vehicle diagnosis system. | ||
| Check | ||
14 | Check coolant level. | ||
Topical note | Notes on coolant | ||
Notes on coolant level | |||
| Service Information: Coolant | ||
If coolant level incorrect | |||
| |||
Correct coolant level. | |||
Coolant | |||
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. | |
15 | Check for leaktightness when engine is running. | Visual inspection only. |
454 589 00 37 00
Hose clamp pliers
001 589 00 91 00
Set of protective caps
000 589 40 37 00
Clamp
129 589 00 91 00
Record plug
Referenced documents
- ad0000s200004c Connect STAR DIAGNOSIS and read out fault memory
- ah0000p500001a Notes on avoiding damage through contamination and foreign objects
- ah2000n208001a Notes on coolant
- ah2000p114201cw Notes on coolant level
- ah4920n000201a Notes on use, material properties and handling of NOx reducing agent
- ah5400p000101a Information on preventing damage to electronic components due to electrostatic discharge
- as0000z000201a Risk of injury. Skin or eye injuries may result when handling hot or glowing objects.
- as0000z000501a 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.
- as2000z000101a Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant.
- as4900z000101a 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.
- as4920z000201a 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)
- si2000s0001a Service Information: Coolant