Larry Bible had this problem about three or four months ago, posted it, and got a very detailed answer about how the coolant from this leak flows. Check out Dr. Diesel's response:

http://www.peachparts.com/shopforum/showthread.php?threadid=59053

FWIW, on my (former) 300E, I had a leak from the side seam of the radiator that was very hard to locate.

__________________
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe