-Volkswagen and Audi models 1975 thru 1993 with external thread on coolant bottle. - Volkswagen models1990-1998 with internal thread on coolant bottle. - Volkswagen and Audi models 1998 and later with internal thread on coolant bottle. -Mercedes E-class 1996 and later. -Mercedes with external thead on coolant bottle (except M-class). -Chrysler Crossfire 2004 and later. -BMW 1998 thru 2002 with external thread on coolant bottle. -Land Rover Range Rover 1995 thru 1997. -Saab with external thread...