Removing and installing hot film mass air sensor - AR07.07-P-1453D

ENGINE 104.94 /99, 111.921 /943 /944 /945 /946 /947 /96 /970 /973 /974 /975 /977 (except, 104.990) 

Fig 1: Identifying Hot Film Mass Air Sensor Components - Engine 104 & 111.975

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 2: Identifying Hot Film Mass Air Sensor Components - Engine 111.945/977 & 111.947

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig. item, etc.	Work instructions
Arrow	Union nut, plug connection	Installing:  tighten union nut until it engages
4/1	O-ring	inspect, replace if necessary, oil to facilitate installation
B2/5	Hot film mass air sensor