One of two 300 SL prototypes built by Rudolph Uhlenhaut, chassis 000 02 is the oldest example in existence today. During its day, it was mainly used for testing purposes and as a result retains the original door-less configuration. Retained by Mercedes-Benz, it was recently subjected to a complete restoration. A complicating factor was that it differed in many details from the subsequent eight 'production' cars built.