I've had my 2000 C280 about 3 years now from 36m to now 63m. So far pretty reliable and nice smooth ride. Have replaced the crankshaft position sensor that was causing a random no-start and random stalling referred to as SSS (sudden stall syndrome). Recently I 've had a CEL that comes and goes. Code sez o2 sensor but I haven't gotten around to replacing it. Changed plugs recently and 2 were fouled causing a rough idle. New plugs and wires seemed to have solved the problem.

When searching for a used benz I zeroed in on this model because it had the most updated 722.6 tranny, the electronic HVAC which works like a charm, keyless entry and no power antenna.

glenmore
1991 300CE
2000 C280
1990 LS400