[2] The International Manufacturers' Championship was open to Group 6 Sports-Prototypes (letter P on the cars) and was contested in two engine capacity divisions, P1 (Up to 2000cc) and P2 (Over 2000cc).
[3] Both championships scored points to the top six competitors in each class, under four different tables or 'Barème'.
Points earned but not counted towards the championship total are listed in (brackets).
Note: The Großer Preis von Hockenheim did not count towards the Over 2000cc division of the International Manufacturers Championship.
[3] The following models contributed to the nett points awarded to their respective manufacturers in the two championships.