First of all thank you very much for your inputs and I found that you are correct BenzMac. I just had my headgasket and upper timing cover leak fixed just a while ago. Just to make sure it is a hose problem, after reading your message, I frist squeeze the hose and found coolant shooting out from from serval spots. I took out the hose and saw a couple of cuts inside of the hose when I look at it under the light.
I think what I will do is to replace the hose first, then see if the leak still occur, if it does I will have the shop take a look at it.
Just by any chances, is it okay to use to old mercedes hose clamps ?
Onces again thank you very much for your help.