1995 Mercedes Benz S420 4.2L with engine code P1137

Question

I need help whit a 1995 Mercedes Benz S420 4.2L whit code p1137, I replace the O2 sensor, and still giving that code there is an electric wiring diagram.

Answer 1

P1137 Lack of 02 sensor switch.

Do a throttle body cleaning first, see if that helps.