During safety inspection on [xxx] subframe assembly was found to have a hole which failed the inspection. I paid $4300 to have it fixed on [xxx]. this I learnt later is a huge safety hazard and can result in fatal accidents- a class action lawsuit exists in europe and in us as well. This part is supposed to last the lifetime of the car. Degraded performance of the car may well be impacting other parts of the car now - I have a cracked windshield perhaps because of frame issues? Mercedes needs to make sure parts used dont endanger drivers lives. Information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6)

- Lansdale, PA, USA

I have a 2015 Mercedes-Benz C300 4Matic got a letter from the company car had few recalls to address. Dropped the at Mercedes-Benz Hampton VA dealership on 12/06/2023 at 8:30 AM EST. After few hours got a call from the dealership that rear subframe of the has bad corrosion and because of the rust it got holes in it which is a bad safety risk. Risk is so great that it cant pass Virginia state inspection. I did a good online research and found it is a common issue in Mercedes-Benz vehicles and the company issued safety recall on some years and models but not on all the affected vehicles. Like my car has the exact same safety issue rear subframe got rust from inside so it was hard to notice till it became unsafe to drive the car. The dealer is asking almost $5000 to replace it. The Mercedes-Benz customer support center is unable to explain why some cars are covered with extended warranty offered by the factory and some doesn't for exact same issue. There are bunch of more people with same complaint but they don't know where to go.

- Suffolk, VA, USA

Mercedes 2015 C300 crank case ventilation hose has a defect and it is well-known to the manufacturer. This causes recurring engine and exhaust problems for a large number of car owners, and it should be part of a recall.

- Carmel, CA, USA

The C300 4matic specifically should be recalled because something near the front end squeaks and makes all types of noises

- Houston, TX, USA

Suspension parts are rusting out fast I don't live in a salted road for black ice type of environment car only has 66K miles and ac pours fuel odors in the cabin interior materials are bubbling up fast even after uv treatments.

- El Paso, TX, USA

The front drivers side suspension squeaks when wheel is turned or going over bumps. This car is less than 5 years old and around 50K miles. I am hopeful this is not a dangerous flaw in the suspension system.

- Potomac, MD, USA

Vibration at high speed around 70 M/H. vibration during warm up after a cold start. Noise coming out from unknown parts possibly suspension when running over bumps at low speed around 7 M/H.

- Houston, TX, USA

I started the engine and the power steering failure warning came on. True enough, it was a struggle to steer my car back home - I was just 3 minutes away from home. The car was towed the next morning to autohaus on edens in northbrook, il. I did a google search and found out that there has been a recall for this exact problem in europe since Dec 2014. I was shocked that owners in the us were not warned of this potential problem and there has been no recall issued. If this had happened on the freeway, it likely would have resulted in a very serious accident and my safety could have been jeopardized. I would like other owners of the 2015 Mercedes Benz C class to be alerted to this potentially serious mechanical problem and the nhsta to investigate why there has been no recall issued in the us......updated 12/17/15 both axles front axles had to replaced.

- Evanston, IL, USA