Question about Mercedes-Benz ML320

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My ML 320, 2000 problem is: engin wont start when I turn key it start to rampling and sounds like no fuel but tank is full in one occassion I had to tow it to repair shop but when mechanic tried it started with no problem, it happens ever othe day I found the problem is when it parked un-leveled

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  • mehrannasser Aug 01, 2009

    problem started since I fill the tank with a regular gas I fill it with high premium gas again but time to time it try to start but fail next day starts with no problem and again happen next day

  • mehrannasser Aug 02, 2009

    Hi Nicolocarlo

    I have checked fuel pumps nothing wrong, pressure is reported 55 psi, I have difficulty again today and noticed it happens even on flat parking when it happens gear shift locked and can not be shift I have to realse shift gear by pushing a pencil into the emergency slot as instructed, afetr few trys it started but there is no problem when driving it happens only afetr engin is off more than one hour it really frosterting me thank you foy your advise.

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There is a inertia switch that sometimes goes bad, the purpose of the switch is to shut off the fuel pump when a vehicle rolls over or impact occurrs. The fact that the problem occurs more on uneven or slanted terrain leads me to that conclusion, this is however merley one in a list of things to check, it is advised to aquire a electrical component locator to find out what the car is equipped with for inertia fuel cutt-off safety switch, go to ebay motors and search for the cd service repair manual for your car they are inexpensive and a valuable tool to have.

Posted on Aug 02, 2009

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Most European cars employs two pumps, one for high and the low. Check if both pumps are running and are clear of dirt or debris. At uneven parking it may have difficulty getting the fuel into the car.

Posted on Aug 01, 2009

  • Nicolo Carlo Parazo Aug 01, 2009

    the type of fuel is unlikely the cause of the problem unless the knock sensor is faulty. You can have it checked but should the sensor be faulty you may experience engine roughness while running. Check first the pumps and the fuel lines. Check for dirt that may have gotten in.

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Sounds like a sticking float level if its the petrol model

Posted on Aug 01, 2009

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