Shown on MODEL 222 with CODE M005 (4MATIC) |
1 | Catalytic converter DPF unit |
2 | Clamp |
3 | SCR catalytic converter |
4 | Reinforcement |
5 | Clamp |
6 | Engine support |
P14.40-2509-12
Danger ! | 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. | |
Danger ! | 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. | |
| Notes on avoiding damage through contamination and foreign objects | ||
| Notes on self-locking nuts and bolts | ||
| Remove/install | ||
1 | Remove center and rear engine compartment paneling downwards | ||
2 | Detach clamp (2) | Installation: Replace sealing ring between catalytic converter diesel particulate filter unit (1) and SCR catalytic converter (3). | |
Installation: Align components of the exhaust system before tightening the clamp (2) free of tension. | |||
Pay attention to installation position of clamp (2). | |||
Screw/bolt, clamp for oxidation catalytic converter | |||
3 | Remove reinforcement (4) | MODEL 222 with ENGINE 642 | |
Screw/bolt, rear reinforcement to frame floor assembly | |||
4 | Detach NOx sensors at SCR catalytic converter (3) | ||
5 | Unscrew union nut for temperature sensor upstream of SCR catalytic converter (3) and remove temperature sensor | ||
6 | Detach AdBlue® metering valve at SCR catalytic converter (3) and place with attached lines to one side |
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7 | Detach clamp (5) | Screw/bolt, clamp for front/center/rear exhaust system | |
8 | Detach SCR catalytic converter (3) from holder on frame floor assembly | ||
9 | Detach SCR catalytic converter (3) on rear engine support (6) | Screw/bolt, bracket for elastomer bearing for front exhaust system to rear engine support | |
10 | Remove SCR catalytic converter (3) | For vehicles except code M005 (4MATIC) | |
| Clean | ||
11 | Remove combustion and corrosion residue at separating points | ||
12 | Install in the reverse order | ||
13 | Connect diagnostic system, read out fault memory and delete if necessary | ||
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Danger ! | 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. | |
14 | Carry out an engine test run and test exhaust system for leaktightness |