Mercedes-Benz issued a recall of certain C-class and E-class vehicles. A lock nut in the steering rack may break under high load, possibly causing the steering to become stuck in one position.
Mercedes May Have Cracks in Microweld
This bulletin applies to 2018 Mercedes-Benz CLS550 vehicles. A complaint may involve a single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end).