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Old 12-16-2007, 09:23 AM   #1 (permalink)
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fuel gauge

hi, my ever wonderful unreliable 2001 ml430 has now got the dreaded fuel gauge error and it always lies about how much fuel i have!
I've read a few forums on here and want to do the fuse reset option obviously my fuse box is by the drivers pedals as it is r/h drive but I dont know whether to pull fuse No.5 (7.5amp instrument cluster) or fuse No.13 (20amp electr. fuel pump)?? is my fuse layout the same as the U.S. ones??
regards
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Old 12-16-2007, 09:29 AM   #2 (permalink)
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I pull out the 7.5 instrument cluster fuse and usually does the trick....but eventually goes back to its usual woes.

Another member wired in a switch to that fuse and place it near the driver, not a bad idea.
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Old 12-16-2007, 09:53 AM   #3 (permalink)
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Originally Posted by kelland View Post
hi, my ever wonderful unreliable 2001 ml430 has now got the dreaded fuel gauge error and it always lies about how much fuel i have!
I've read a few forums on here and want to do the fuse reset option obviously my fuse box is by the drivers pedals as it is r/h drive but I dont know whether to pull fuse No.5 (7.5amp instrument cluster) or fuse No.13 (20amp electr. fuel pump)?? is my fuse layout the same as the U.S. ones??
regards
It is fuse #5 that you have to pull. The tech. bulletin also says that after the gauge registeres correctly, only refill the tank when it shows half full. Whether or not it works, I do not know but it might be worth a try..

Last edited by 43sqd; 12-16-2007 at 07:37 PM.
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Old 12-16-2007, 10:35 AM   #4 (permalink)
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good luck. ive tried fixing this problem forever. no luck
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Old 12-16-2007, 10:48 AM   #5 (permalink)
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good luck. ive tried fixing this problem forever. no luck
Believe the only way to correct your and others problems permanently is to replace the fuel pump/sending unit with the latest part number. In very rare cases the problem is with the cluster and that must be replaced if thats the case to cure it permanently. Years ago I had this with my original 98 ML and also with my 01 E Class that only required replacement of the sending unit not the fuel pump. The 02 ML500 I had and my curent 06 never had this problem nor did my 05 E Class.
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Old 12-16-2007, 04:21 PM   #6 (permalink)
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Do you pull the fuse out when the key is in position 0, 1, or 2?
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Old 12-16-2007, 05:49 PM   #7 (permalink)
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i had my dealer pull the fuse out one day when it was in for service, but it didnt do ANYTHING. i agree, i think its the sending unit. why fuel pump though?
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Old 01-07-2008, 01:32 PM   #8 (permalink)
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Do you pull the fuse out when the key is in position 0, 1, or 2?

In the other thread the guy said the key was in position 2 but engine OFF!
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Old 01-08-2008, 12:22 PM   #9 (permalink)
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In the other thread the guy said the key was in position 2 but engine OFF!

Yes, Position 2 (all the lights on the dash come on right before you would start it), but car not running.

Pull fuse when dash is lit (guages die), then plug fuse back in (will read correctly)

My 00 ML has this issue. Dealer said they would reprogram the cluster 1st (less than $80). If that does not fix the issue, then its on to the Fuel sender/pump replacement. (You generally replace both, becuase the sender sits on top of the FP, so while they are both out, you replace both)


UK
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Old 01-09-2008, 11:39 AM   #10 (permalink)
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Yes, Position 2 (all the lights on the dash come on right before you would start it), but car not running.

Pull fuse when dash is lit (guages die), then plug fuse back in (will read correctly)

My 00 ML has this issue. Dealer said they would reprogram the cluster 1st (less than $80). If that does not fix the issue, then its on to the Fuel sender/pump replacement. (You generally replace both, becuase the sender sits on top of the FP, so while they are both out, you replace both)


UK
the first time i pulled the fuse it worked, the second time it stuck at the halfway point so to me its not an instant fix pulling the fuse!
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