1 | Threaded cap (fuel filter) |
3 | Threaded cap (fuel prefilter) |
4 | Hand pump |
N47.20-2170-11
5 | Sealing ring |
6 | Sealing ring |
G47.20-3154-71
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. | |
Danger | Risk of explosion caused by fuel igniting, risk of poisoning caused by inhaling and swallowing fuel as well as risk of injury to eyes and skin caused by contactwith fuel. | No fires, sparks, open flames or smoking. Pour fuels into suitable and appropriately marked containers only. | |
Topical note | Notes on avoiding damage through contamination and foreign objects | ||
| Remove | ||
1 | Open cap of fuel tank and reseal | This relieves overpressure in the fuel tank. | |
2 | Clean the area surrounding the fuel filter module | ||
3 | Replace fuel prefilter | ||
4 | Unscrew the threaded cap (1) of the fuel filter | Wait until the fuel has flowed out of the fuel filter housing before removing threaded cap (1) with filter insert. | |
5 | Remove threaded cap (1) of fuel filter with filter insert from fuel filter housing and unclip filter insert by pushing at sides | | |
6 | Remove water from water separator | ||
| Install | ||
7 | Replace sealing ring on threaded cap (1) of fuel filter and grease lightly | MB multipurpose grease, 400 g | |
8 | Coat sealing rings (5 and 6) using grease included in parts kit | ||
9 | Insert new filter element into the threaded cap (1) of the fuel filter | ||
10 | Screw on threaded cap (1) of the fuel filter with filter insert and tighten | Engine 470.9, 471.9, 473.9Fuel filter cover to fuel filter module | |
11 | Release handle of hand pump (4) by turning it | ||
12 | Operate hand pump (4) until a back pressure can be noticed when pumping | ||
13 | Tighten handle of hand pump (4) | ||
| Check | ||
14 | Check the leak tightness of the fuel filter module while the engine is running | Perform a visual inspection only and then switch off the engine. | |
15 | Delete error "Fuel filter replacement due" or "Fuel filter clogged" with the diagnostic system | Only if fault code was shown beforehand. | |
See information from body manufacturer. | |||
16 | Confirm renewal of air filter element in service record book |