
Mercedes-Benz 9c14 fault code indicates an open circuit in the Neck Protection Headrest (NECK-PRO). Engine Malfunction Light: Engine malfunction light affects engine smoothness, power performance, and environmental performance; common causes are related to fuel quality. Tire Pressure Warning: Low or excessively high tire pressure, or driving with underinflated tires after replacement should be avoided. Brake Pad Warning: Brake pads have reached the wear limit; please visit a repair shop for inspection and replacement as soon as possible. ABS and ESP warnings—drive at low speed and with caution. Proceed to a repair shop for inspection promptly.


