Well I got the new radiator in and filled it up with gen-u-ine MB antifreeze... did a 25mi drive shakedown.... no overheateing (about what it was before I cracked my other one - don't ask)... checked all the hoses... no leaks, but I noticed the tranmission cooler lines that go from the hard lines near the engine to the bottom of the radiator look to be wet near the ends by the radiator. They are probably the original lines as they had some cracks.

I was very careful with the lines with the radiator swap, but I guess disturbing them made them start to weep (or maybe they already were in that state - hard to know).

Do they fail often? Another thing to tackle I guess.

__________________
~shell
As of 2/2010:
2001 CLK55 0o\=*=/o0
13.6 @ 106mph
10K mi
1984 300SD
260K mi and going and going...
97 S600
46K miles
1991 Sentra SE-R (extremely dorked with)
www.se-r.net