Thanks for the feedback and congratulations with your keen eye on spotting potential future problems. Yes, it appears that these lines are from the transmission to the radiator. This system conditions the automatic transmission fluid (ATF) temperature so it won't get too hot.
If the ATF hasn't been changed in the past 30,000 miles now is a good time to do it... and also a good time to replace the cracked rubber cooler lines. I don't think opening the lines will dump most of the fluid out, but if you do both jobs at the same time it doesn't really matter.
ATF doesn't burn the paint like brake fluid. But be careful on the cleanliness of the fluid going into the transmission. Unlike the engine, the transmission is more sensitive to dirt.
95 E320 Cabriolet, 131K