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Old 09-02-2005, 09:33 AM   #1 (permalink)
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ML 320 Fuel Gauge Malfunction

I filled up my tank with gas however the fuel gauge stayed on empty and has remained this way for the past 3 days. Does anyone have any suggestions?

Thanks.
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Old 09-17-2005, 03:00 PM   #2 (permalink)
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Vehicle: 01ML320, 280TE, 260E, 560SL, SLK230
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RE: ML 320 Fuel Gauge Malfunction

Hi tredja,
I have the same problem with my 1998 ML 320. I have read on previous post that disconnecting the connector on the driver side rear will re boot the sending unit. I tried it and it works. The key should be on the off position before diconnecting the connector. Remove connection ( it is attched to the right rear chassis) turn the ignition switch to 2 position ( not starting) and connect the connector. It should reboot the sending unit. You wond muss the connector. Give it a try. It worked with my 98. Good luck.
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Old 09-17-2005, 03:41 PM   #3 (permalink)
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RE: ML 320 Fuel Gauge Malfunction

Although it hasn't happened in our M yet, the sending units have failed in both our SL and the E class- - - seems to be another one of those MB quality control issues.

You might put the year of your Benz and your location in your profile-- it'll get you better answers to your issues.

Welcome to the forum.
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Old 09-18-2005, 09:11 AM   #4 (permalink)
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RE: ML 320 Fuel Gauge Malfunction

I had the same problem on a 2000 CLK 320 after I changed to a cheaper, though same octane gasoline. Problem went away after I changed back. Later, I heard about some higher sulfer gasolines causing similar malfunctions.
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Old 09-18-2005, 12:39 PM   #5 (permalink)
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RE: ML 320 Fuel Gauge Malfunction

Higher sulfer oils are typically from S. America and Venezuela--refined in the southeast refineries (many of which are shut down at present).

I've not heard that the type of fuel would cause the problem, but I suppose anything's possible... or it could be one of those periodical Mercedes gremlins.[}:)]
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Old 09-20-2005, 04:43 AM   #6 (permalink)
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RE: ML 320 Fuel Gauge Malfunction

i had 98 ml320 now i have 00 ml320 same problem with gauge my luck happened before warranty expired , derek[:D]
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Old 09-21-2005, 06:58 AM   #7 (permalink)
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RE: ML 320 Fuel Gauge Malfunction

I had my fuel sending units replaced on a 2000 C230. The dealer said that it's a common problem, because of bad fuels. Recently, after filling up at Costco, the Check Engine light came on. The light stayed on until my next fill up, this time at another station. And yes, I only use premium fuels. The check engine light has not illuminated since. Lesson learned -- saving a few pennies a gallon is not worth it in the long run.
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Old 09-21-2005, 07:06 AM   #8 (permalink)
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RE: ML 320 Fuel Gauge Malfunction

Most likely it is simply that the gas cap was not put on securely. See the following thread

http://www.benzworld.org/forums/forums/thread-view.asp?tid=1212179&posts=4

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Old 03-30-2006, 05:24 PM   #9 (permalink)
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RE: ML 320 Fuel Gauge Malfunction

wow I love this site already!!! I just bought a 01 ML 320 last week and the fuel gauge quit working. After 5 minutes on this site my problems fixed!Thanks
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Old 01-06-2009, 10:27 AM   #10 (permalink)
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wow I love this site already!!! I just bought a 01 ML 320 last week and the fuel gauge quit working. After 5 minutes on this site my problems fixed!Thanks
I bought an 2001 ML320 with 71K miles yesterday and I have the same problem with the Fuel Guage Indicator. I completely filled the tank with premium gas and the fuel guage is is showing empty. Can you please explain how you fixed the issue?

Thanks much
Raj
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