2009 Mercedes-Benz C300 suspension problems
36 owner complaints filed with NHTSA name the suspension on the 2009 Mercedes-Benz C300 — 6% of all complaints for this model year.
What owners report
“The entire rear subframe of any W205 body model including but not limited to the C class from 2009-2014, CL class, SL, class ETC. suffers admittedly from MB USA, premature rust, deterioration etc. there is an active recall for these same models in Canada and all of Europe but not the USA. My garage…”
filed Jul 5, 2024
“After noticing brake fluid leaking I took my car to a local automotive shop and when he raised it to checkout the break line when he found the leak from the rust . he noticed a more serious problem that the subframe was rusted out on each side. He told me to contact Mercedes immediately because the…”
filed Apr 7, 2024
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements and/or Creaking/crackling noises from the area of the wheel bearing on the front axle when cornering/…
LI33.20-P-078406 · Service Bulletin/Repair Instructions · issued Jul 7, 2026Complaint Potential corrosion on the rear axle carrier Cause Due to market-specific conditions such as moisture, ingress of dirt and/or environmental influences, corrosion can occur on the rear axle carrier Remedy In…
LI35.10-P-078931 · Service Bulletin/Repair Instructions · issued May 13, 2026Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements and/or Creaking/crackling noises from the area of the wheel bearing on the front axle when cornering/…
LI33.20-P-078406 · Service Bulletin/Repair Instructions · issued May 12, 2026Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements and/or Creaking/crackling noises from the area of the wheel bearing on the front axle when cornering/…
LI33.20-P-078406 · Service Bulletin/Repair Instructions · issued Apr 17, 2026
Suspension problems in other C300 years
| Year | Reports | Share |
|---|---|---|
| 2016 C300 | 1 | 0% |
| 2015 C300 | 22 | 6% |
| 2014 C300 | 11 | 12% |
| 2013 C300 | 67 | 26% |
| 2012 C300 | 68 | 26% |
| 2011 C300 | 60 | 13% |
| 2010 C300 | 26 | 6% |
| 2008 C300 | 12 | 2% |
Other reported problem areas on the 2009 Mercedes-Benz C300
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.