In Australia, most W201s were 1.8 and 2.0. The 1.8 was supposed to take around 12 to 13 seconds to 100km/h. The 2 litre was around 10 to 11 and the 2.6 about 9 seconds. I'm sure a '92 2.3 can manage better than 12 seconds. The late 2.3 had more power than the early ones. My cat equipped '90 is good for 97kW or 130hp (no cat were 100kW or 134hp). Manual transmission should help too. I think about 9.5 seconds is more like it. My 190E-2.3 5-speed subjectively feels about as fast to 100km/h as either my 350SLC or 300TE (both autos) which are supposed to be good for 0-100km/h in 9 seconds. A fairly low first gear and 3.47 diff help the 190E (not sure if auto has same diff). My 350SLC also has a 3.47 diff but a much taller first gear being only a 3-speed. The 300TE (being a wagon) has a 3.27 diff and 4-speed. One thing I do know, none of mine come close to my father's '93 E320 coupe. Being an Aussie spec it has the 5-speed auto with a stump pulling 3.69 diff. This thing is a tyre smoking rocket off the line. I think 0-100 kays comes up in the low 7s!

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107.023: 350SLC, 3-speed auto, icon gold, parchment MBtex (sold 2012 after 29 years ownership).
107.026: 500SLC, 4-speed auto, thistle green, green velour.
124.090: 300TE, 4-speed auto, arctic white, cream-beige MBtex.
201.028: 190E 2.3 Sportline, 5-speed manual, arctic white, blue leather.
201.028: 190E 2.3, 4-speed auto, blue-black, grey MBtex.
201.034: 190E 2.3-16, 5-speed manual, blue-black, black leather.