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2012 Mercedes-Benz C300: fuel leak

5 of the 267 complaints about the 2012 Mercedes-Benz C300 describe fuel leak.

owner complaints
5
of this car's complaints
2%
recalls
1
Is there a fix? There is 1 recall for this area of the car. See below

Fuel leak by model year

What owners say

Filed Sep 12, 2026 · Fuel system · WI

Fuel tank is rusting. Leaking fuel, heavy fuel smell inside cabin. My saftey and anyone around the vehicle would be at risk due to fire chance. Confirmed by independent service center Vehcile has only been inspected by me and the shop Only symptom that appeared was fuel smell in my garage and a puddle of gasoline underneath the vehicle.

Filed May 19, 2026 · Fuel system · MA

Vehicle: 2012 Mercedes-Benz C300 4Matic Sport Problem Component: Fuel / Propulsion System Safety Issue Description: My 2012 Mercedes-Benz C300 developed a serious fuel tank leak at approximately 106,460 miles which created overwhelming gasoline fumes and rendered the vehicle unsafe to operate. The gasoline fumes were extremely strong and entered the passenger area. The fumes were severe enough that I became physically overwhelmed from the gasoline exposure and discarded clothing due to gasoline contamination and odor. A local repair facility identified the leaking fuel tank. I was informed the replacement fuel tank was allegedly on extended backorder through Mercedes-Benz channels. Because the vehicle was unsafe to drive and replacement parts were allegedly unavailable for several months, I was forced to tow the vehicle from [XXX] to [XXX] at my own expense in order to locate a repair facility that could obtain a replacement fuel tank and safely repair the vehicle. The repair invoice states: “Installed used lt fuel tank incl switchover fuel pumps replace section of steel fuel line front of tank from lower braided line.” I am submitting this complaint due to: serious gasoline leak safety concerns, severe gasoline fume exposure, potential fire hazard, and the alleged extended unavailability of replacement fuel tanks. Mercedes-Benz USA Case Number: 22302114 INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 23, 2022 · Fuel system · IL

Car is leaking gas very dangers . I contact Mercedes dealer regarding the recall on this type of Mercedes i have and they said only vehicles manufactured from April 18, 2011, through July 12, 2011. Mine was before or after , and they refuse to give me the exactly date for my car manufacturer. Car I use for Uber , and i don’t have any other income . If someone just through away a cigarette in parking lot might cause a big problem in the building and others cars in parking

Filed Oct 11, 2022 · Fuel system · IL

My Mercedes 2012 C 300 is leaking gas which may lead to fire ( the fuel filter flange when operated in high temperatures

Filed Jul 15, 2022 · Fuel system · AZ

My car smell like a gas leak. I had went to a car shop to have the car to looked at. The mechanic had told me that the fuel filter flange is leaking gas.

Related recalls

Fuel system, gasolineReported December 3, 2012 · 5,800 vehicles affected
What is wrong
Mercedes-Benz is recalling certain model year 2011-2012 S400, S550, S550 4Matic, S63 AMG, C300, C300 4Matic, E350, GLK350, GLK350 4Matic, CL550 4Matic, and CL63 AMG vehicles manufactured from April 18, 2011, through July 12, 2011. Due to an irregularity stemming from the molding process of the fuel filter flange, the fuel filter flange may crack when operated in high temperatures.
Risk
If the fuel filter flange cracks, it will leak fuel which may lead to a fire if an external ignition source is present.
Remedy
Mercedes-Benz will notify owners, and dealers will replace the fuel filter, free of charge. The recall campaign is expected to begin in February 2013. Owners may contact Mercedes-Benz at 1‑800‑367‑6372.

Recall number 12V557000 · Recall details

Questions about the 2012 Mercedes-Benz C300 fuel leak

Is fuel leak a common problem on the 2012 Mercedes-Benz C300?

5 of 267 owner complaints about the 2012 Mercedes-Benz C300 (2%) mention fuel leak. The model year with the most reports is 2016.

Is there a recall or service bulletin for this on the 2012 Mercedes-Benz C300?

There is 1 recall and 0 service bulletins for the same area of the car. Check them below with your VIN.

Other symptoms on the 2012 Mercedes-Benz C300

Ball joint 7

All model years of the Mercedes-Benz C300

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