Merzario and Laffite started in the midfield , 15th and 17th respectively , and Laffite retired with an engine failure .
Merzario finished fourth , scoring three World Championship points .
Although Merzario and Laffite started in the midfield , 15th and 17th respectively , and Laffite retired with an engine failure , Merzario finished fourth , scoring three World Championship points .