The 25 Most Reliable Cars Ever

17. 1976-1985 Mercedes-Benz W123

With its efficient diesel engine, the W123 provided drivers with a more affordable option than other vehicles of the time with some of the best engineering (minus electronics under the hood which could lead to pricy repairs when things go wrong. The W123 was not cheap when bought new which often meant that owners took good care of them, which means that most used W123s available are in pristine condition.