2010 C300 Fuel Gauge Needle Dropped
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Newbie
Joined: Mar 2012
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C300
2010 C300 Fuel Gauge Needle Dropped
Hello Friends,
While I was driving, the needed of the fuel gauge started to drop from half tank of gas full to completely zero gas. When I had started up the car in the morning, the sensor was just fine. Then while I was driving, 10 mins after starting up the car, the needle just dropped.
Please help. Is the sensor gone bad or could it be something else?
While I was driving, the needed of the fuel gauge started to drop from half tank of gas full to completely zero gas. When I had started up the car in the morning, the sensor was just fine. Then while I was driving, 10 mins after starting up the car, the needle just dropped.
Please help. Is the sensor gone bad or could it be something else?
MBWorld Fanatic!
Joined: Jul 2008
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2019 G70 6MT & 2022 Ford Maverick XL
You're getting terrible gas mileage, and then when you stop someone sneaks some fuel into the tank! 
Just kidding. You should still be under warranty, no? If so take it in - no need in worrying. Just make sure you fill up. Most likely it is just a sensor.
Just kidding. You should still be under warranty, no? If so take it in - no need in worrying. Just make sure you fill up. Most likely it is just a sensor.
MBWorld Fanatic!
Joined: Feb 2004
Posts: 3,986
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From: SEATTLE WASHINGTON USA
'08 C300 Lux Barolo Red Beige Leather P2 MM 18" wheels '84 944
Hold it!! Do not fill the tank if there is a chance a sensor must be replaced. If the W204 is like my old W203, the sensors are located in a well in the top of the tanks and fuel can be spilled when the sensor is removed with fuel at the full mark.
MBWorld Fanatic!
Joined: Jan 2008
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C300 Sport/Palladium Silver on Black/P2
I wonder those with this problem what brand of gas you use?
In certain vehicles, Techron concentrate (fuel system cleaner not the fuel injector one that is more diluted) has shown to help restore fuel sensor operation.
If you drive for a while like this, be extremely careful not to run out of gas.
In certain vehicles, Techron concentrate (fuel system cleaner not the fuel injector one that is more diluted) has shown to help restore fuel sensor operation.
If you drive for a while like this, be extremely careful not to run out of gas.
Newbie
Joined: Oct 2013
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2010 C300 sport V6
Changing the fuel sending Unit
Hi Ya'll,
I have a 2010 C300 V6 Sport, and the fuel gauge is acting very crazy, during the same day, marks fuel and empty
My question is, how can I change it? Do I need to place down the tank? Please help me out.
I have a 2010 C300 V6 Sport, and the fuel gauge is acting very crazy, during the same day, marks fuel and empty
My question is, how can I change it? Do I need to place down the tank? Please help me out.
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Joined: Jun 2008
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
You need to get the car onto a Star & work out the issue. It can be anything from the 2 saddle tank sender units to the averaging module to the cluster to the rear SAM & it's programming to a simple below par battery.
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