29. Mercedes 500E
The W124 series of the Mercedes mid-size sedan was famous for its quality, elegance, and luxury, but also for its restrained looks. However, the flat sides, sober design, boxy-shaped roof, and rear end with straight lines and square headlights were boring compared to other cars from the period.
Even the 500E model, which comes with the 5.0-liter V8 engine that developed 326 HP looked boxy and dull. Regardless, it was one of the best performance luxury sedans of its era.