I suggest you replace all the hoses while you are in there and I second LarryBible's advice that you go ahead and remove the radiator. To do so you must disconnect the transmission cooler hoses but thats easy and it gives you the opportunity to renew them with newer versions that have wire wraps for protection. A little fluid will escape but not much.

I just took that small hose to the car parts place and they matched it with one I could cut a section out of.

Nic
'85 300CD