Trust the Stant brand to take care of the needs of your vehicle’s cooling parts’, like the radiator cap. The brand carries radiator caps which are sure to fit well in your auto’s cooling system. Though this particular accessory may be regarded as lightweight in terms of functionality, you still cannot deny the fact that the radiator cap in every vehicle delivers a significant contribution to the said auto. Just take the case of the ST10235 Stant Radiator Cap for your 1986-1992 Mercedes 300E. This product will effectively prevent the loss of coolant which is important to keep your Mercedes engine from overheating. The Stant Radiator Caps are usually constructed of corrosion-resistant, heavy gauge metal. The special construction of these parts will assure long service and an accurate control of pressure. Specifically, these caps will keep the coolant from boiling, thus keeping the engine at low temperature. They keep the coolant cool by pressurizing it. And instead of boiling away, the pressure levels up the boiling temperature of the coolant. The radiator cap allows the coolant to be heated above the boiling point without boiling it. Without the cap or with a faulty cap, the coolant will evaporate or boil over at low temperature! You will not want this to happen to your Mercedes, so better use only a reliable cap like the ST1035 Stant Radiator Cap. Take time to search our site and see for yourself our selection of Stant products.