Thanks, I've added them:

http://www.imcdb.org/vehicle_705561-Seat-600-E-1970.html
http://www.imcdb.org/vehicle_705563-1970.html
http://www.imcdb.org/vehicle_705564-Mercedes-Benz-1968.html
http://www.imcdb.org/vehicle_705565-Peterbilt.html

The Seat 1500 is already in comments here http://www.imcdb.org/vehicle_194765-Seat-1500-1969.html , so I'm not going to make another page.