NHTSA Complaint #11504516 — 2012 MERCEDES-BENZ C300

SUSPENSION issue reported to NHTSA

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Complaint Details

ODI Number	11504516
Vehicle	2012 MERCEDES-BENZ C300
Component	SUSPENSION
Date of Incident	January 30, 2023
Date Filed	January 30, 2023
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	NJ

Consumer Description

The left side of rear subframe has rusted out. The right side had been repaired by welding by a previous owner. The damage is still present and can be inspected. The broken bracket is right next to the gas tank and can possibly contact or dent the tank during a hard break or collision. This is a common problem with many people expressing this online and at the 3rd party repair shops. No warning signs were present until the bracket snapped. Extensive rust and corrosion around the area, specifically on the inside of the subframe.

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Other SUSPENSION Complaints

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Recent Complaints for the 2012 MERCEDES-BENZ C300

#11701264 — STRUCTURE:BODY — November 24, 2025 — Mercedes of Danbury replaced the rear sub frame CODE 3441 47, since my mechanic (Newtown Auto Repair) told me that th...

#11696118 — FUEL SYSTEM, GASOLINE — October 28, 2025 — The contact owns a 2012 Mercedes-Benz C300. The contact stated the fuel tank was emitting a fuel odor. The contact st...

#11682005 — STRUCTURE:BODY — August 20, 2025 — Rear subframe rotted out and broke due to corrosion. Rear crossmember is broken and needs replaced. My safety as wel...

#11682005 — UNKNOWN OR OTHER — August 20, 2025 — Rear subframe rotted out and broke due to corrosion. Rear crossmember is broken and needs replaced. My safety as wel...

#11673323 — AIR BAGS — July 14, 2025 — I was driving normally last week when the driver's head restraint system (known by Mercedes as Neck Pro) unexpectedly...