Probably too late but you don't need to replace the whole radiator - just the plastic "tank" on top. I got the part for $25.00 from the company that makes radiator tanks after finding this in a search of this forum. Radiator tank on my '84 300D broke off the same way, but at 400,000 miles, it's hard to complain. If you haven't already ditched the radiator save some bucks and replace only the broken part! F