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Sometimes the check engine light will come on if the fuel cap is not on tight enough. Check the fuel cap for an intact seal and install at correct tightness.
A major auto parts store will read out the stored trouble code in the car's computer for free. If the code pertains to the fuel EVAP system, the code probably set because you ran out of gas. Copy down the code and then have it erased. The check engine light should go out. If it comes on again, have the code read and the problem checked out.
Most of the time Check engine light will come due to Gas and gas cap issues. If you ran out of gas and gas lost pressure it will bring the light on. Make sure to fill take with premium (91 octane) gas and make sure gas cap is closed completely. loose gas cap will cause the engine light to come on. If after doing this you still get the engine light warning, take to authorized mercedez deal for code check.
U MAY HAVE SUCKED SOME DEBRIS INTO THE FUEL FILTER.HAVE THE ENGINE LIGHT SCANNED TO FIND OUT WHAT THE CODE IS.THAT WILL HELP LEAD U IN THE RIGHT DIRECTION
if you have high milieage you may have sucked in the gunk on the botton of your tank when you ran out of fuel check if you can hear the fuel pump running for about 2 sec with key on engine off if you hear nothing the problem is with your pump as they will burn out if they run dry for too long,if you hear the pump check for fuel pressure if pressure low check fuel filter to see if clogged by gunk from bottom of tank.
When the engine ran out of gas it most likely misfired as the last of gas was used up, this will cause a check engine light to be set by the system called the Misfire Monitor. Clear the code, it should'nt come back.
Don't know if it'll help, but, my 2002 Sportage's check engine light came on when I put gas in it and stayed on until I ran out all of that tank full. I asked at that station if anything had been added to their fuel, and after a lot of hee hawing, they admitted they were adding ethanol! So, watch where you buy gas!!
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