1990 HOT WHEELS SPEED POINTS #158 CASTROL RESEARCH TEAM MERCEDES-BENZ UNIMOG! The 1990 Hot Wheels Speed Points #158 Castrol Research Team Mercedes-Benz Unimog is a diecast toy vehicle featuring a white and red color scheme, with a scale of 1:64. Part of the Speed Points Blue Card series by Hot Wheels, this model represents the Castrol Research Team Mercedes-Benz Unimog from 1990. Manufactured in Malaysia, this collectible truck is a part of the Blue Card theme and is sure to be a sought-after addition to any diecast vehicle collection.