How do you access Fuel Pump on 190E 2.6 - Mercedes-Benz Forum

 
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post #1 of 6 (permalink) Old 10-26-2005, 08:05 PM Thread Starter
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How do you access Fuel Pump on 190E 2.6

would anybody know how to replace the fuel pump on a 93 190E2.6,
Does the gas tank have to be taken down therefore the car has to be lifted up or is the pump accessible without having to lift the car? Back seat or trunk?
Also how to check the fuel pump relay?
I bought this car new and the MB dealeship had been all services on time ect... but now I want to know more about the car before atking it in as I have friends mechanics to whom I would rather give the work when needs be.
The car has 161kmiles adn an odd thing has been happening evry day for few months: every time I 'd get in the car there would be a soft growling/humming sound coming from the lower part of the right back seat so as this point the I would have not put the key in yet. Then I would put the key in and would start the car just fine and that sound would stop and the car would run just fine thereafter.
Then 2 days ago, same scenario except that this time before putting the key in, that odd sound was not there for the 1st time in months and I go to start the car puttting the key in and it did not start.
With a friend mechanically inclined we went and checked the fuel pump sound before ignition and the pump seemed to do its right sound, we checked the starter and ignition systems and all was fine.
So we still think the fuel pump or fuel feeding system would seem to be the pronblem!!
Any insight on this topic?
thank you
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post #2 of 6 (permalink) Old 10-26-2005, 11:46 PM
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RE: How do you access Fuel Pump on 190E 2.6

The fuel pumps (there are two) and the fuel accumulator are located under the car, approximately under the rear seat area, and they are covered by a plastic sheild.
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post #3 of 6 (permalink) Old 10-27-2005, 09:28 AM Thread Starter
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RE: How do you access Fuel Pump on 190E 2.6

Thank you very much for the answer.
So in other words the dual pumps can be accessed removing the rear seat?
Did you have suggestions as for the chronological steps to take to troubleshoot the situation I described as we don't know if truly the dual pump went bad or the Fuel pump relay or else ?
Somebody mentioned the following to check the Fuel Pump Relay: "The fuel pump would work when you initially turn the ignition on but when you tried to start the car the fuel pump wouldnt run. Pulled out the relay and bridged pin 87 to pin 15 so the fuel pump is always running when the ignition is on. That resolved the problem so im just waiting on a new fuel pump relay"

So is the Fuel pump relay located near the fuel pumps?

Where can one get a manual for a 190E 2.6 without going through the MB dealer?
thank you
S
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post #4 of 6 (permalink) Old 10-27-2005, 02:18 PM
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RE: How do you access Fuel Pump on 190E 2.6

Quote:
slyone - 10/27/2005 11:28 AM
Where can one get a manual for a 190E 2.6 without going through the MB dealer?
thank you
S
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post #5 of 6 (permalink) Old 10-27-2005, 03:53 PM
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RE: How do you access Fuel Pump on 190E 2.6

The fuel pumps are under the car, not inside the cabin or the trunk. The fuel pump relay is located behind the battery, under the hood. Behind the battery is a "false" wall that is designed to protect the relays from the heat of the engine bay.

I suggest going over to http://mb.braingears.com to browse the online W201 manual.
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post #6 of 6 (permalink) Old 10-28-2005, 02:11 PM Thread Starter
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RE: How do you access Fuel Pump on 190E 2.6

MTI, thank you again, very helpful, found the very detailed info on site you indicated.
Found the FP relay easy to lift up from base but could not get it out becase of tight thick black bundle of wires in front of it which we guess will have to disconnect from the control unit so we can get FP relay out.
Thanks
S
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