Question about 1989 Mercedes-Benz 300-Class

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1989 mercedes 300e can the fuel pump relay be reset or does it have to be replaced? is there a way to check it?

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Autohaus.com is a great place to get relays, usually cheaper than anyone. Normally the fuel pumps just go bad tho. I checked my pump with 2 wires while the car was of and put straight power to it.

Posted on Jun 15, 2009

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Posted on Jan 02, 2017

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  • 202 Answers

SOURCE: location of fuel pump relay Mercedes 300E 1993

you need to remove the cover behind the battery .
fuel pump relay ( K27 )

I hope this can help you.

Posted on Mar 25, 2010

  • 14036 Answers

SOURCE: My 1989 mercedes 300e won't start. Not getting any fuel

problem is in the fuel pump fuse and relay.

Posted on Jun 09, 2009

  • 224 Answers

SOURCE: 1989 Mercedes 300E dual fuel pump?

i would replace both because they are only good as the bad one

Posted on Jul 04, 2009

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1 Answer

Mercedes 300e 1989. Pre ignition when I turn the key off and still wont start. any help


if starter turns and engine will not ignite remember it is fuel, electrical or mechanical check the fuel pump relay then fuel pumps the relays do fail after 20 years the pumps rarly fail.
Did you change the fuel filter?
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electrical gremlins are challenging but if you are systematic and have a wiring digrahm you will find the problem

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1992 mercedes 300e cranks over starts for a second then die


Could be a number of things. Start with the fuel pump relay. When your key is in the start/crank pos. it overides the relay as soon as you release the key to run possition the relay has to stay ingaged or the fuel pump will shut off. Also look in your owners manuel for impact or emergency fuel shut off switch reset.

May 13, 2011 | 1992 Mercedes-Benz Mercedes Benz 300 Class

1 Answer

Location of fuel pump relay Mercedes 300E 1993


you need to remove the cover behind the battery .
fuel pump relay ( K27 )

I hope this can help you.

Mar 25, 2010 | 1993 Mercedes-Benz E-Class

1 Answer

1989 Mercedes 300E dual fuel pump?


i would replace both because they are only good as the bad one

Jul 01, 2009 | 1989 Mercedes-Benz 300-Class

1 Answer

1989 mercedes 300e dual fuel pumps?


Depends, if you are if you replace the one that was working you wont get enough pressure. Also go get the check valve as those can go bad at the same time as the pumps.

Jul 01, 2009 | 1989 Mercedes-Benz 300-Class

5 Answers

Need to find the fuel pump for a 1989 mercedes benz 300e


that particular model has an external fuel pump
is located underneath and if you take the rear driver side wheel you will get to it easier but not if you are going to replace you fuel pump replace the fuel filter also or otherwise the new pump will not last.
and have a large container handy because wend you take the fuel pump off. you will spill a large amount of gas .
the tube going from the pump to the gas tank in on the bottom of the tank and will spill all the gas in it unless you move quickly.

Jun 29, 2009 | 1989 Mercedes-Benz 300-Class

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'89 benz 300e, hard to turnover when starting, fuel pump/filter?


Run some Sea Foam Through it you tube sea foam It works

Apr 18, 2009 | 1989 Mercedes-Benz 300-Class

1 Answer

On my 1989 Mercedes Benz 300E there are 2 fuel pumps, they appear to be the same pumps, is this correct? Thanks in advance


yes,that original set-up of mb,reason behind that,one pump working 100 percent to attain fuel press.while two pump working only 50 percent each,long use of two pump

Feb 18, 2009 | 1989 Mercedes-Benz 300-Class

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