I just put in a new trunk seal on the 240 today. The trunk closes very snugly now. I don't know yet if it keeps water out, the glue is probably still curing. But it was pretty easy, and I don't think it was more than $50.

__________________
1985 300TD-euro 352,000 mi
1974 240D (1?)52,000 mi - has a new home now