This professional AC pressure sensor is specially fitted for C200, C300 and CLK350 vehicles. It real-time monitors internal refrigerant pressure of air conditioning pipeline and transfers accurate data to vehicle control unit. It intelligently adjusts AC working mode, protects compressor from overload damage and ensures stable cooling effect. Adopting premium corrosion-resistant materials and fine sealing technology, it maintains stable performance in long-term daily driving use, being ideal original replacement part for vehicle air conditioner maintenance.