fwiw- in the range of purchasing a used MB for $22k I'd much rather select a:

>'92-'93 500e
>'92-'95 400e/e420
>'94-'95 E320 Sedan, Wagon, Coupe, Cabriolet

...naturally these other used MB models offer much more machine for the $22k

I'd consider $12k-$13K a reasonable sales price on a 5 year old C230 w/ complete records & maintence @65k miles (+/-)...but sell that C230 quick, entry level models lose value the fastest w/ mods adding very very little to the vehicle value (if not detracting from the value)

hope this helps, the car looks nice

-fad