Leak in the steering rack. Rack replaced. Also did the B service at the same time and replaced suspension wear items like the control arms and thrust arm bushings. Included an alignment.
The rear suspension is very harsh, even the smallest bumps are amplified and the rear seems to bounce excessively. I have taken my C350 back to MB service 15 times. Service advisor says the car is operating per spec. Will call lemon law att.
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frequently 2014 Mercedes-Benz C-Class problems occur, check out our car reliability stats.