This has been answered before a few times but I cannot find the threads right now. The cars hold up well. Weak areas are the front-end components and electrical accessories such as power windows. Engines are pretty bulletproof. No wiring issues. You will note there are relatively few posts for 98,99 C230 problems. Some people like the 96 though. I have had no ASR issues. It works well. Note this is different than ESP which is stability control. I don't have the supercharger so I don't know about that. They get very good MPG which is nice. Parts are readily available since many of these were built, and many parts were used for lots of years in a row. So is that one about 9K CAD?

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra