O2 sensors position - GF07.04-P-4103-02F

Engine 104, 119, 120 

Engine 104 

Fig 1: Identifying O2 Sensor Position - Upstream Of TWC (Engine 104)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Engine 104 

Fig 2: Identifying O2 Sensor Position - Downstream Of TWC (Engine 104)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Engine 119, 120 

one O₂ sensor for each bank of cylinders/exhaust stream

Fig 3: Identifying O2 Sensor Position On Left (Engine 119,120)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Engine 119, 120 

one O₂ sensor for each bank of cylinders/exhaust stream (shown M119 in model 140)

Fig 4: Identifying O2 Sensor Position On Left, Downstream Of TWC (Engine 119,120)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.