There are many ways to maintain and preserve the functionality of every engine component in your Mercedes 300DT. The most common of them is cleaning or routine maintenance. But your vehicle is normally equipped with components that can maintain the proper functionality of these components. One of them is the radiator which functions as it cools the engine components. This cooling device dissipates coolant that absorbed the excessive heat of the cylinder. Out of its heavy-duty, this coolant must be preserved in its tank and will need to be capped for purity purposes. Therefore, it should be locked at all times. The locking mechanism is handled by the radiator extension tank cap. Like the fuel cap, it is also made of steel material. Also, it may or may not feature the logo of the vehicle’s manufacturer. Maintaining the coolant at its proper temperature is the prime objective of this cap and it is necessary for your vehicle to have its durable kind. You do not have to worry in finding one for your Mercedes as our online catalog has a wide array of this component and where you can choose the best for your vehicle. Investing for this cap is an assurance that your vehicle’s engine components will be free from damaging situations such as overheating and others. Because of this, you are to maintain your stock and of it become erratic, replace it with the Mercedes 300DT Germany radiator expansion tank cap available here.