I consistently get 19-20 mpg in all-city driving in my 97 E320. Not bad for a full-sized sedan of this calibre if you ask me. I've never taken it on an all-highway trip; it's good to know I'd be pushing the mid- to upper- twenties.

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280