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International Automotive Technicians Network
Re: fuel pump relay mb 420 sel
Posted to Technical Discussion Forum on 3/14/2004

HI Patrick

Something's not adding up here. Some basic testing is needed here for me to be of more help. But I'll give you a few ideas.

This missing relay makes no sense if you have fuel pressure. Are you testing with fuel gauges hooked up or is there volta... Login to read more.