NHTSA Complaint #11473746 — 2009 MERCEDES BENZ C300

My spouse was driving approx 40MPH. Traffic light turned amber so she applied the brakes, at that point the vehicle pulled violently to the left into on coming traffic and at the same time the vehicle rear end was fish tailing out of control.Our mechanc inspected the vehicle and discovered the rear sub frame assembly had cracked on the driver side. We were advised by the mechanic this car is un driveable. Our Insurance appraiser inspected the vehicle and stated this is very common with this model vehicle and is a very bad design flaw. I contacted the Mercedes dealership and they advised there is no re-call on the subframe so I would need to pay $4000-$5000 for the repair. This vehicle is worthless to me now and is a grave safety risk to drive. I do not have the funds to fix this vehicle so I am now without a car. Mercedes customer care will not even answer any telephone calls. I have called 3 times and been on hold for over 60 minutes each time. This design flaw needs to be corrected by Mecedes before someone gets killed.