Question about 1986 Mercedes-Benz 300

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86 mercedes 300e wont start i ran a wire from fuel pump to battery and it starts

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Your Fuel Pump Module is bad. It is located behind the battery on the passenger side. Remove the plastic cover next to the battery, you will see the ECM, behind it, there are 3 boxes, 1 for AC, 1 for OVP, and one for Fuel Pump Control Module. They all have labels for identification on replacement.

Posted on Aug 08, 2009

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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.
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