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Old 07-24-2003, 07:20 PM
Meza's Avatar
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Join Date: Jan 2003
Location: SC
Posts: 148
How to bleed fuel lines on a 190e 2.6L?

Anyone knows how to safely bleed the fuel lines on a 190e 2.6L (1993). The idea I have (!) is to energize the fuel pump while the engine is cold then crack the lines open. Am I righ, If so, how do you energize the pump on these cars?
1993 190E 2.6
Advanced Diesel Systems Test and Research Engineer
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Old 07-24-2003, 07:55 PM
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Join Date: Nov 2002
Location: florida
Posts: 83

why bother when you replace the fuel filter the same thing happens you loose presure the you crank the engine over a few times until it builds up presure and starts.??
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Old 07-25-2003, 05:10 AM
leoreyes69's Avatar
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Join Date: Jul 2003
Location: San Luis AZ
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but y are u trying to do dat? What is the prob. w/ it.Cause i have a problem w/ mine and maybe u can help me. maybe
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Old 07-25-2003, 08:08 AM
Posts: n/a
There is no need to bleed the system on a gas engine car. The system bleeds itself after a few seconds of ignition voltage.

In a diesel, the volume of fluid put through the barrel on each stroke is minimal, thus without bleeding you would run down two or three batteries before enough fuel works its way to the injectors to provide total liquid, thus adequate pressure to overcome the hundreds of pounds of pressure in the cylinder.

A gas engine does not have any of these problems. To begin with the pump is electric and starts building pressure and providing volume immediately upon receiving voltage. Secondly, once the injector opens, it is injecting fuel into an intake runner that is not under pressure as is a diesel cylinder.

Hope this helps,
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Old 07-25-2003, 01:43 PM
sixto's Avatar
smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 18,745
There is no procedure in the MB shop manual to bleed the fuel system of an M103.

You'll probably flood a cylinder or two if you jump the fuel pump.

95 S420
91 300SE
87 300SDL
83 300SD
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