I'm in the market for a replacement for my 1993 300E and was told by my mechanic that the 1998 through 2000 E320 is a very good choice that is also very reasonably priced. I'm currently driving one of his loaner C230 Kompressors and like it. I'm wondering what would be a better choice from a dependability and economy standpoint. What are some of the issues I should be aware of in each model? Thanks in advance for the help!

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1993 300E 2.8 185k miles
2006 Mustang Convertible 4.0 Eaton Supercharged