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My fuel guage on my 9 year old mercedes 320 avantgarde clk…

Customer Question
My fuel guage on...

My fuel guage on my 9 year old mercedes 320 avantgarde clk show s a quarter full but runs out of petrol - is this an electronic fault e.g.. some fuek sensor or sludge or something in the petrol tank. When I fill the tank up ithe car goes ok but then the same thing happens, it has happened twice?

Mechanic's Assistant: Thanks. Can you give me any more details about your issue?

All the author gauges, temperature etc seem to be working OK and I recently had the car serviced

Submitted: 2 years ago.Category: Mercedes
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Answered in 17 minutes by:
1/22/2016
Mercedes Mechanic: Kevin, Master tech replied 2 years ago
Kevin
Kevin, Master tech
Category: Mercedes
Satisfied Customers: 3,112
Experience: Diagnostic technician
Verified

Hi im kevin this is most commonly cause by a bad sensor in fuel tank .the sensor is a potentiometer and what tends to happen is it fails in the most common fuel position around the quarter tank mark .so the circuit fails below this but will show the rest

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