A/C refrigerant status is one of the most common buyer questions, since 1993 is the R12-to-R134a cutover year. Knowledgeable commenters identify conversions by the larger service fittings screwed onto the original lines, and note that weak cold-air performance can trace to temperature sensors rather than just low charge.
A/C: R12 versus R134a conversion
Mercedes-Benz 190E / 190D (W201) · ownership