S-Class (W140) 1991-1999: 300 SD, S 350TD, 300 SE 2.8, S280, 300 SE 3.2, 300 SEL 3.2, S320, S320L, 400 SE, S420, 400 SEL, S420L, 500 SE, S500, 500 SEL, S500L, 600 SE, S600, 600 SEL, S600L, 500 SEC, 600 SEC

1995 S420. Fuel level gauge does not indicate correct level of fuel.

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Old Apr 10, 2020 | 01:34 AM
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VOYT's Avatar
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W220 S500, W220 S430, W140 S420
1995 S420. Fuel level gauge does not indicate correct level of fuel.

Hi everyone. Does anybody knows what could be the issue with my S420 fuel gauge? It shows a half tank of gas while the level is at the very minimum. Could it be a gauge itself or should I look somewhere else (sending unit, fuel filter etc.)???
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Old Jun 27, 2020 | 06:11 PM
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1997 S320 SWB
Originally Posted by VOYT
Hi everyone. Does anybody knows what could be the issue with my S420 fuel gauge? It shows a half tank of gas while the level is at the very minimum. Could it be a gauge itself or should I look somewhere else (sending unit, fuel filter etc.)???
The problem is most likely in the sending unit in the fuel tank. It was for me in a 1997 S320. Remove the trunk upholstry, particularly the center section, to access the sending unit which is mounted center of the tank near the top. Obviously, you do this only when the actual fuel level is down below half. This, like most electrical parts, probably is available in the aftermarket at prices half or less of MBNA's "List" price over the parts room counter.
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