Smog sensor replaced by new version - BT83.40-P-0001-03S
WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.
MODEL WDB140.### /### (except 140.057 /076) #A as of 1.9.95 with CODE (306a) Activated charcoal filter (odor filter) fehlt
MODEL WDB140.057 /076 #A as of 1.9.95
The smog sensor (B31) is also installed in combination with the new AAC pushbutton control module. The smog sensor (B31) allows automatic switchover from fresh air to recirculated air depending on the percentage of CO-/NOx
in the outside air when the activated charcoal filter button (
) on the AAC pushbutton control module is pressed.