Mercedes 300E Filter update & Question

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Chuckyg - 09 Jan 2006 18:29 GMT

Hi again.... I installed the new filter near the pumps. Everything is o.k.
back there... The car starts up and runs ok, but after a few minutes the
check engine light appears and stays on. After I turn the car off, the
light comes back on once the car is started. But the car still operates
fine. Isnt there another fuel filter in the car somwwhere before the
motor? Or what else could this be and why does the check engine light
appear? I appreciate everyones help-Chuck Monmouth COunty NJ (I went to
the MB dealer aroudn the corner for the MB Fuel Filter)-

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Josh - 09 Jan 2006 18:58 GMT

It could be any number of things. You've got to find out what the error
code (or codes) is on the OBD. With a 300E I'm assuming that it has flash
codes. I've inserted a quick why to get the codes from an old post.
Alternatively, take it to a place like Autozone and they'll read the OBD for
free.

>Hold the button for 2 - 3 seconds to start to read
> codes. Reading codes involves just counting the times the LED blinks,
> and then correlating that with the right table in the .pdf manual.
> Then hit the button for 2 - 3 seconds to get the next code, and
> continue until the first one repeats. When you want to clear them,
> hold the push-button for more than six seconds.

Josh

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Chuckyg - 09 Jan 2006 22:22 GMT

Someone else told me that the tank may have to be taken down and replaced
or boiled. I know that it is fuel starvation at this point. It has all
of the symptoms. There was a little black "sut" in the old filter, which
leads me to believe that the tank is bad. HOw hard is it to take the tank
out of this car? Can I do anythign else about this? -Chuck- NJ- 89 300E
130K

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George Mann - 11 Jan 2006 06:18 GMT

> Someone else told me that the tank may have to be taken down and
> replaced or boiled. I know that it is fuel starvation at this point.
> It has all of the symptoms. There was a little black "sut" in the old
> filter, which leads me to believe that the tank is bad. HOw hard is
> it to take the tank out of this car? Can I do anythign else about
> this? -Chuck- NJ- 89 300E 130K

Sounds like you might have bad fuel hoses (rotting internally). Drain the
tank and replace the hoses.

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