Question about 2004 Mercedes-Benz C-Class

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Fuel gauge stop working

After filling up I check my fuel gauge an it was not working I checked the fuse form but it does not have a fuse for that I also notice that my trunk light is not working both were fine a day ago can someone enlighten me as to what might be wrong. the vechile is a 2004 mercedes benz

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Most likely your problem is the fuel sending unit in the fuel tank mounted with the fuel pump assy. The symptoms might let the gauge sit on or work intermittently then is goes to empty. DON'T let the dealer tell you its only replacable by changing the whole fuel assy.(400.00). This is not true. Look up your vehicle on the AC Delco web site at the top of the page click the link for part look up, it will ask you the year, style, eng size, etc. then you look at fuel , the part is actually called TBI Fuel Meter. If your truck is a 5.7 your part is #17113274 (around $100.00). This is a actual GM part number, some are the AC Delco part number that may have 2 letters and 4 digits, the dealer can cross reference it or order the AC Delco part. This kit comes with a new wiring harness, and instructions. Having said this the other symptom you may have is the gauge goes past full, this is because of a bad ground, most likely around fuel tank. I have replaced approx 6 of these sensors in GM vehicles( 2 of the same year and make as yours) in the last year, its cheap design lets it fail easily.

Posted on Jul 02, 2008

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