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#1
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C280 1995- gas gauge-how do it work?
Hello,
Does the gas tank have a float or is it an electronic metering device that sends a signal to the gas gauge? My gas gauge lately has periodically signalled empty having a full tank. I shut off motor, open gas cap, let out pressure, replace cap. Upon start up and there on, the needle registers correctly again. Does the gas tank have a screen that may be gunked up? (any easy way to blow air into it to clean up or how to remove screen?? Thanks for any information.
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1979 300D 220 K miles 1995 C280 109 K miles 1992 Cadillac Eldorado Touring Coupe 57K miles SOLD ******************** 1979 240D 140Kmiles (bought for parents) *SOLD. SAN FRANCISCO/(*San Diego) 1989 300SE 148 K miles *SOLD |
#2
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You might want to buy a new gas cap. I think they are supposed to be vented and when they get old or bad they don't vent. That is why some cars fail Emissions tests. because of a bad gas cap. Just a thought.
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1986 Euro 500SEC "RUF" 9:1CR, "Rose" 1985 Euro 500SEC Cabriolet AMG Widebody 1982 Euro 500SEL "Blue" 2001 Texas Heeler (Aussie/Queensland X) "Sulphie", 2012 Queensland Red Heeler "Squeak" Best dogs I've ever had. |
#3
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Thx.
Is the gas cap supposed to be vented? Anybody confirm?
Other factoids?
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1979 300D 220 K miles 1995 C280 109 K miles 1992 Cadillac Eldorado Touring Coupe 57K miles SOLD ******************** 1979 240D 140Kmiles (bought for parents) *SOLD. SAN FRANCISCO/(*San Diego) 1989 300SE 148 K miles *SOLD |
#4
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No vent on any gas cap after 1974 in the USA. System has charcoal cannister to vent the tank system.
The fuel guage is part of the instrument cluster (computer). There are 2 sending units in the tank, connected in series. The guage averages those readings.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
#5
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Thank you MBDOC.
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1979 300D 220 K miles 1995 C280 109 K miles 1992 Cadillac Eldorado Touring Coupe 57K miles SOLD ******************** 1979 240D 140Kmiles (bought for parents) *SOLD. SAN FRANCISCO/(*San Diego) 1989 300SE 148 K miles *SOLD |
#6
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On my C280, if I really fill 'er up, the gauge will read low, then as gas is used, the needle moves back toward full.
Are filling it up too high?
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Thank You! Fred 2009 ML350 2004 SL600 2004 SL500 1996 SL600 2002 SLK32 2005 CLK320 cabrio 2003 ML350 1997 C280 Sport |
#7
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It is not being topped off max as far as I am aware of.
However, the real reading was at 3/4 full when the jumpy needle toward empty occurred three times. Thanks for your anecdote.
__________________
1979 300D 220 K miles 1995 C280 109 K miles 1992 Cadillac Eldorado Touring Coupe 57K miles SOLD ******************** 1979 240D 140Kmiles (bought for parents) *SOLD. SAN FRANCISCO/(*San Diego) 1989 300SE 148 K miles *SOLD |
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