After thinking I just had a bad upper radiator hose, (and replacing same) I've discovered my leak in my 98 E300TD is really happening where the core meets the driver side case. (leaking heavily down the side of the radiator case). I'm not very familiar with this style of radiator. Are they repairable. With 150k on the car, is a radiator repair worth it compared to the $300 Rusty charges for a replacement unit?