S49.20-A114-78
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 transmitter range (min. 2 m). | ||
2 | Release and disconnect injection line (2) and seal exposed openings with suitable stop plugs. | Collect escaping AdBlue ®. | |
Installation: Clean connection of injection line (2) with lint-free rag. | |||
Record plug | |||
3 | Remove electrical connector (3) from bracket. | Installation: Check retaining clip. | |
If the retaining clip has been damaged, | |||
| |||
Replace retaining clip. | |||
4 | Release and disconnect electrical connection (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) and seal exposed openings with suitable stop plugs. | Collect coolant which flows out. | |
Installation: Replace spring bracket clamps (6). | |||
Record plug | |||
Hose clamp pliers | |||
8 | Loosen clamp (7) and remove metering valve (1) upwards. | 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 with a suitable protective cover. | 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 | Connect vehicle diagnosis system, read out fault memory and clear if necessary. | ||
| |||
| Check | ||
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. | |
13 | Perform engine test run; during this, check metering valve (1) and engine cooling system for leaktightness. |
454 589 00 37 00
Hose clamp pliers
001 589 00 91 00
Set of protective caps
129 589 00 91 00
Record plug
000 589 40 37 00
Clamp
Referenced documents
- ad0000s200004e Connect STAR DIAGNOSIS and read out fault memory
- ah0000p500001a Notes on avoiding damage through contamination and foreign objects
- ah4920n000201a Notes on use, material properties and handling of NOx reducing agent
- ah5400p000101a Information on preventing damage to electronic components due to electrostatic discharge
- ar2000s1010e Inspect cooling system for leaks
- 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)