Fuel Guage hard facts
05-28-2004, 07:47 PM
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Fuel Guage hard facts
SOund slike my guage is playing up like numerous posts here. erratic reading, only reaqding 3/4 after filling up, park it half full wake up to an empty car.
My car is six months out of warranty and expecting a struggle on my hands to get this known problem sorted so wondering if theres any hard proof or a service notice or info from MB themselves that i can use as ammo?
My car is six months out of warranty and expecting a struggle on my hands to get this known problem sorted so wondering if theres any hard proof or a service notice or info from MB themselves that i can use as ammo?
06-08-2004, 05:46 PM
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ML Fuel Gauge pobs. possible fix!!!!!!!!
heres something i found trolling the forums...
http://www.mercedesshop.com/shopforu...threadid=69637
heres the short version
I'm surprised no one has had a problem like this before There are a few wierd things going on with the fuel monitoring system on the ML's, at least for the last few years, Essentially what you have is a system that monitors the actual fuel level for only the first few liters of consumption out of the tank, using the traditional float method. after it used up a certain quantity of fuel, it would then STOP using the traditional method of fuel level monitoring and instead starts using the engine control module to calculate the amount of fuel being consumed and detracting that from the fuel level reading, what they call a "virtual calculation". One problem they were running in to was with people who wouldn't burn off that first quantity of fuel before filling up the tank again, so if for example you vehicle was set up to use the "actual reading" method for 10 liters, and you filled up after only using 9 liters, it would throw the whole thing out of whack, you may fill it up for example at that point and the gauge would mysteriously drop to "zero fuel". Ain't that neat?
The "real" fix is to disable this whole "virtual calculation" BS. It can be changed in the instrument cluster (with the MB shop computer, SDS) to operate only off of the actual fuel level sender, and it'll work great.
I'm going in to my dealer armed with this info tomorrow (9th june '04) and will let you know how i go!
http://www.mercedesshop.com/shopforu...threadid=69637
heres the short version
I'm surprised no one has had a problem like this before There are a few wierd things going on with the fuel monitoring system on the ML's, at least for the last few years, Essentially what you have is a system that monitors the actual fuel level for only the first few liters of consumption out of the tank, using the traditional float method. after it used up a certain quantity of fuel, it would then STOP using the traditional method of fuel level monitoring and instead starts using the engine control module to calculate the amount of fuel being consumed and detracting that from the fuel level reading, what they call a "virtual calculation". One problem they were running in to was with people who wouldn't burn off that first quantity of fuel before filling up the tank again, so if for example you vehicle was set up to use the "actual reading" method for 10 liters, and you filled up after only using 9 liters, it would throw the whole thing out of whack, you may fill it up for example at that point and the gauge would mysteriously drop to "zero fuel". Ain't that neat?
The "real" fix is to disable this whole "virtual calculation" BS. It can be changed in the instrument cluster (with the MB shop computer, SDS) to operate only off of the actual fuel level sender, and it'll work great.
I'm going in to my dealer armed with this info tomorrow (9th june '04) and will let you know how i go!
06-13-2004, 07:41 PM
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ML 320
sup i'm new here learning alot from these info's thanks and
yea the fuel gauge is the same on mines,
am i able to disable the virtual calculation and use the actual fuel level sender on my own....
or any way that i can avoid going to dealer...
yea the fuel gauge is the same on mines,
am i able to disable the virtual calculation and use the actual fuel level sender on my own....
or any way that i can avoid going to dealer...
