I have an s330 that appears to have sprung a small leak in the radiator. I haven't found the hole yet but I am suspecting either the radiator or an o ring. Does anyone know of a product that is SAFE that works like a stop leak that can buy me some time? I don't want a $600-800 repair if I can help it. I am not losing much coolant but since I mulch, the part of the radiator that gets wet clogs up with the cedar shavings debris that gets pulled in. Any good ideas? thanks in advance!