1955 Mercedes-Benz 300 SL Alloy Gullwing sells for almost $7M

This 1955 Mercedes-Benz 300 SL gullwing coupe has something special hidden beneath its silver paint. It’s one of just 29 “Alloy Gullwing” coupes built between 1955 and ’56, and it was sold late last month at an RM Sotheby’s auction in Phoenix, Arizona, for $6.825 million. Formally known as the “Leichtmetallausführung” or “Light Metal…