Phill,

I own a 88 300e and a 83 300cd. Although I have not replaced the oil cooler hoses on either as of yet. I have replaced the tranny cooler lines on the E. The hoses were kinda wet and spongy looking. Parts are inexpensive (purchased from the FASTLANE) and it is definately a DIY job. One caution to pass on is possiblity of aluminum fittings on the radiator side of the lines, which could be stripped easily.

Marks88