CJPJ
2008 3500 170 EXTD 3.0 V6 OM642.993 4.182
Re: Water in Fuel -
Draining the fuel filter
WARNING: Fuel is highly flammable. Improper handing of fuel creates a risk of fire and explosion.
Avoid fire, naked flames, smoking and creating sparks under all circumstances. Switch off the ignition and auxiliary heating before carrying out work to the fuel system. Always wear protective gloves.
Environmental note: Dispose of the water-fuel mixture in an environmentally responsible manner.
If the indicator lamp lights up, drain the fuel filter with water separator immediately. Otherwise, the engine may be damaged.
Vehicle with a diesel engine:
http://www4.mercedes-benz.com/manua...bols/mbsymb1b_inv/mbsymb1b_inv_003a-large.png if the indicator lamp in the instrument cluster goes on, drain fuel filter with water separator immediately.
Mercedes-Benz recommends that you have this maintenance work carried out at a qualified specialist workshop.
Park the vehicle safely and secure it from rolling away.
Switch off the auxiliary heating system more.
Switch off the engine.
Open the bonnet more.
Place a suitable receptacle under drain hose
Turn the key to position 2 in the ignition lock.
Open drain plug immediately until the water/fuel mixture flows out of drain hose
Screw in drain plug as soon as approximately 0.2 litres of the water/fuel mixture have been collected.
The electrical fuel pump halts the flow of the water/fuel mixture after 30 seconds.
After draining, turn the key back to position 0 in the ignition lock.
Dispose of the collected water/fuel mixture in an environmentally responsible manner, e.g. at a qualified specialist workshop.
Check drain plug. The drain plug must be closed.
When the engine is running and drain hose is open, fuel is lost through drain hose
Close the bonnet.
If the indicator lamp does not go out after draining:
Drain the fuel filter again.
If the indicator lamp does not go out after draining for the second time, have the cause checked immediately at a qualified specialist workshop.
from: Operators ManualIt's always good to be skeptical but... the manufacturer has specifically stated that the product is designed to filter water and has provided an explanation of how the filtering mechanism works , along with a drawing. Is it remotely possible that rather than the drawing being absolutely wrong that we are (from the single view available) simply missing or misunderstanding something in the design?
Clearly any filter has limits as to what it can do and in extreme cases it can and will become overwhelmed and fail, but beyond that I'm not sure I understand the refusal to accept even the possibility that the filter does what the manufacturer says it does. Are you saying that they are confused about their own product, or intentionally misrepresenting the filter's capabilities, or ..?
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Draining the fuel filter
WARNING: Fuel is highly flammable. Improper handing of fuel creates a risk of fire and explosion.
Avoid fire, naked flames, smoking and creating sparks under all circumstances. Switch off the ignition and auxiliary heating before carrying out work to the fuel system. Always wear protective gloves.
Environmental note: Dispose of the water-fuel mixture in an environmentally responsible manner.
If the indicator lamp lights up, drain the fuel filter with water separator immediately. Otherwise, the engine may be damaged.
Vehicle with a diesel engine:
Mercedes-Benz recommends that you have this maintenance work carried out at a qualified specialist workshop.
Park the vehicle safely and secure it from rolling away.
Switch off the auxiliary heating system more.
Switch off the engine.
Open the bonnet more.
Place a suitable receptacle under drain hose
Turn the key to position 2 in the ignition lock.
Open drain plug immediately until the water/fuel mixture flows out of drain hose
Screw in drain plug as soon as approximately 0.2 litres of the water/fuel mixture have been collected.
The electrical fuel pump halts the flow of the water/fuel mixture after 30 seconds.
After draining, turn the key back to position 0 in the ignition lock.
Dispose of the collected water/fuel mixture in an environmentally responsible manner, e.g. at a qualified specialist workshop.
Check drain plug. The drain plug must be closed.
When the engine is running and drain hose is open, fuel is lost through drain hose
Close the bonnet.
If the indicator lamp does not go out after draining:
Drain the fuel filter again.
If the indicator lamp does not go out after draining for the second time, have the cause checked immediately at a qualified specialist workshop.