I'd be very much up for a 190e, or preferably a 190d. Have you driven any other Mercs of the era, other than the big 'un? I'm torn between a W123 300D, a W124 300D or a 190 2.5D.
Does it have that boat-on-a-calm-lake ride quality that made me love the W123 so much?
Only a few w124s, all very serene.