1938 Mercedes-Benz 540K Sport Cabriolet

Restoring a 540K is not for the faint of heart. The chrome bill alone on these cars can run close to $50,000

Mercedes-Benz introduced the 500K in 1934. The “K” designation stood for Kompressor, German for supercharger. With power increasing from 100 hp to 160 hp when the supercharger engaged, the cars were among the fastest grand touring cars of the time.

Although similar in many respects, the new-for-1936 540K model offered even more power: 115 hp naturally aspirated or an impressive 180 hp with the blower engaged. A 12-inch increase in wheelbase to 128 inches improved ride quality and gave coachbuilders more room to create even longer and more elegant lines. The hood was extended, while the raked, V-shaped radiator and external exhaust pipes gave the car an undeniable visual presence. Long sweeping fenders, gently skirted, added to the visual length of the car, while chrome accents highlighted the lines and added a sparkling elegance. Just 419 540K chassis were built before production ended in 1940.

Most coach-built bodies for Mercedes-Benz’s...