Question about 1993 Mercedes-Benz Mercedes Benz 300 Class
Check the fuel pump(S). If memory serves the fuel pumps are in tandem in plastic box on the underside beneath the near side passenger seat. Even though the box keeps most of the elements at bay corrosion will eventually have its effect. First check the fuses and the also the OVP relay unit fuse. The OVP sits behind the battery and is in a 6cm x 6cm x 10cm black box. The lid lifts off and beneath it there is a clear plastic hinged door within which is a 10Amp spade type fuse. I mention this as on some models power is supplied to the fuel pump via the Over Voltage Protection relay. If all looks OK check that no vacuum pipes coming off the intake manifold have come loose and that there are no other possible sources of air leak. If everything OK it is time to get under and look at the pump(s) and the fuel filter which sits along side it. Check power supply. Overhaul pump and replace fuel filter as appropriate.
Posted on May 05, 2010
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Posted on Jan 02, 2017
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