S 500 4MATIC (220.184) V8-5.0L (113.966) (2003)
Oxygen Sensor: Locations
O2 Sensors, Location
O2 Sensors, Position
Engine 112, 113
G3/4
O2 sensor on right, upstream of TWC
G3/6
O2 sensor on right, downstream of TWC
Engine 112, 113
G3/3
O2 sensor on left, upstream of TWC
G3/5
O2 sensor on left, downstream of TWC
Position on engine 137
G3/7
O2 sensor on left upstream of TWC Cylinders 7 - 9