MERCEDES-BENZ issued a recall on the S CLASS model

On certain vehicles, metal particles (machine flash) may be present in the ABS/traction control speed sensor mounting holes. These particles can come loose, attach to the sensor or rotor, and falsely indicate a wheel lock condition during normal braking. This false wheel lock signal could cause premature ABS function at the rear brakes which could increase stopping distances. Correction: Affected vehicles will be inspected for possible metal particles attached to the sensor rotor and, if necessary, cleaned.