In my experience, when there is suspicion or detection of coolant leakage, changing just one component often results in several repairs. Therefore, if any portion of the cooling system begins to fail, I believe it is more prudent to replace all components. You will go on an extended journey of pursuing various components at different intervals in an attempt to rectify the failures as they manifest individually. One notable aspect of these vehicles is this. If they overheat, you are finished. Conclusion. Even a little indication of cooling issues might result in significant expenses. My L322 operates at half on the gauge under standard conditions; thus, if it overheats, there is insufficient time to halt and save the system before it becomes very hot. Although this is expensive, I recommend replacing all the hoses and plastic components entirely. As I said, it is expensive, but the assurance it provides justifies the cost for me. My perspective.