This is a 1937 540k Mercedes Benz Cabriolet C. The supercharger whines on startup until the oil cools enough to release the clutch. I would have followed it outside but my camera batteries died. Note the similarities with the 500k Cabriolet C in my other video. The styling is slightly different but the mechanics are very close. The 540k had more horsepower but also more weight so performance was just about the same.
mercedes, benz, 540k, 500k, supercharger, prewar, classic, oldtimer, kompressor, 1937, car, antique, supercharged, cabriolet