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#1
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Fuel gauge light on W116 300SD.
Dear friends:
The fuel gauge light on my friend's W116 300SD (1980) comes up frequently even if the fuel tank is full. The fuel gauge needle does correctly show the remaining fuel in the tank, but the light is on most of the time. It seems that the fuel light has something to do with the seat belt circuit because yanking the driver seat belt may cause the fuel light to be on or off sometimes. What's the most common cause for this problem? Thanks. Best regards, Eric |
#2
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I am not familiar with this model MB, but it sounds like the seatbelt light in the instrument panel has been put into the wrong hole in the cluster (the fuel low position)
IIRC, the low fuel li a contact in the tank sender which can only close the circuit if the float gets to a low fuel level. Please educate me if I am in error.
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Tony from West Oz. Fatmobile 3 84 300D 295kkm Silver grey/Blue int. 2 tank WVO - Recipient of TurboDesel engine. Josephine '82 300D 390kkm White/Palamino int. Elizabeth '81 280E, sporting a '79 300D engine. Lucille '87 W124 300D non-turbo 6 cylinder OM603, Pearl Grey with light grey interior Various parts cars including 280E, 230C & 300D in various states of disassembly. |
#3
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Dear Tony,
No, the problem only happens recently. The seat belt thing is only my random observation of the problem. Eric |
#4
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My 1980 SD's light has been on for the last few days. Havn't had a chance to chase it down yet, but will report what I find when I do.
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1980 300SD Manganese Brown Metallic Clearcoat 248k 1979 300SD White 148 k 1984 300D Silver project car for daughter 1982 300D wrecked 1980 300SD 310K not running |
#5
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Quote:
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Proud owner of .... 1971 280SE W108 1979 300SD W116 1983 300D W123 1975 Ironhead Sportster chopper 1987 GMC 3/4 ton 4X4 Diesel 1989 Honda Civic (Heavily modified) --------------------- Section 609 MVAC Certified --------------------- "He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche |
#6
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Sounds like you're having an intermittant short to ground somewhere... could be in the fuel sender, could be anywhere else. Don't know what to tell you to troubleshot... good luck with it!!!
BHDR... both of my '79 300SD's have low fuel lights. You must have a special one John '79 300SD |
#7
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Thanks to all for your suggestion.
Dear jdblann: if you find out the problem, please post it here. I've been too busy lately and don't have time to mess around with cars. Thanks in advance. Best regards, Eric |
#8
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Quote:
__________________
Proud owner of .... 1971 280SE W108 1979 300SD W116 1983 300D W123 1975 Ironhead Sportster chopper 1987 GMC 3/4 ton 4X4 Diesel 1989 Honda Civic (Heavily modified) --------------------- Section 609 MVAC Certified --------------------- "He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche |
#9
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Quote:
Yours may have a blown globe or broken wire.
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Tony from West Oz. Fatmobile 3 84 300D 295kkm Silver grey/Blue int. 2 tank WVO - Recipient of TurboDesel engine. Josephine '82 300D 390kkm White/Palamino int. Elizabeth '81 280E, sporting a '79 300D engine. Lucille '87 W124 300D non-turbo 6 cylinder OM603, Pearl Grey with light grey interior Various parts cars including 280E, 230C & 300D in various states of disassembly. |
#10
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Quote:
__________________
Proud owner of .... 1971 280SE W108 1979 300SD W116 1983 300D W123 1975 Ironhead Sportster chopper 1987 GMC 3/4 ton 4X4 Diesel 1989 Honda Civic (Heavily modified) --------------------- Section 609 MVAC Certified --------------------- "He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche |
#11
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Chances are that if it doesn't come on with the key before start, that it won't come on when fuel is low . Most likely it's just a blown bulb or some corrosion on it's contacts.
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