S49.20-A105-79
1 | Metering valve | 4 | Retaining clip | 7 | Protective cover | ||
2 | Injection line | 5 | Electrical wiring harness | 8 | Clip | ||
3 | Electrical connector | 6 | Retaining clips | 9 | Coolant hoses |
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. | |
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. | |
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. | |
Topical note | Notes on coolant | ||
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 | ||
Notes on coolant level | |||
| Remove/install | ||
1 | Raise vehicle. | ||
Topical note | Special instructions for lifting and supporting vehicle | ||
2 | Remove right front wheel. | ||
3 | Remove right front fender liner. | ||
4 | Disconnect electrical connector (3). | ||
5 | Remove electrical connector (3) from the retaining clip (4). | To do this, activate the catch hook and push the electrical connector (3) onto the retaining clip (4) (arrow A). | |
Installation: Check retaining clip (4) for damage. | |||
If damage exists, | |||
| |||
Replace retaining clip (4). | |||
6 | Remove electrical wiring harness (5) from retaining clamps (6). | ||
7.1 | Remove rear engine compartment lining. | Model 470 except code Y1J (underbody protection) | |
Installation: Install rear engine compartment lining only after the leak test. | |||
7.2 | Remove center underbody protection. | Model 470 with code Y1J (underbody protection) | |
Installation: Install center underbody protection only after the leak test. | |||
8 | Release protective cover (7) in the working area. | To do this, push protective cover (7) onto the metering valve (1) until the connector coupling of the injection line (2) is accessible. | |
9 | Remove injection line (2) from the metering valve (1). | To do so, operate locks. Capture escaping AdBlue® and seal connections. | |
Commercially available devices/tools | |||
Installation: Clean connection of injection line (2) with lint-free rag. | |||
Record plug | |||
10 | Remove metering valve (1) from the exhaust gas aftertreatment unit. | To do this remove clamp (8). | |
Installation: Replace clamp (8). | |||
Clamp, AdBlue® metering valve to exhaust gas aftertreatment unit | |||
11 | Clamp off coolant hoses (9) in areas (arrows B, C). | Clamp | |
12 | Remove metering valve (1). | Removal: Mark assignment of coolant hoses (9) to metering valve (1). | |
To do this, remove coolant hoses (9) from the metering valve (1) and capture escaping coolant. | |||
Commercially available devices/tools | |||
Installation: Observe markings applied to the coolant hoses (9). Check clamps for damage. | |||
Record plug | |||
Hose clamp pliers | |||
If damage exists, | |||
| |||
replace the affected clamp. | |||
13 | 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 covers | |||
14 | Install in the reverse order. | ||
15 | Read out and delete fault memory. | If a new metering valve (1) is installed. | |
| |||
16 | Pour in coolant and bleed engine cooling system. | ||
Coolant | |||
Cooler vacuum filling device | |||
Adapter | |||
| 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. | |
17 | Perform engine test run and check metering valve (1) for leak tightness. | Visual inspection only. |
454 589 00 37 00
Hose clamp pliers
454 589 00 91 00
Adapter
129 589 00 91 00
Record plug
000 589 40 37 00
Clamp
001 589 01 91 00
Set of protective covers
285 589 00 21 00
Cooler vacuum filling device
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