Upstream 02 Sensor ciruit
 

Help,
ISO, wiring diagrams for an 05 C230 Kompessor 1.8
Particularly the pinout diagrams for the two 02 sensor(s) body harness from the ECM-to-02 connectors etc.
Geting minimal voltage reading from the upstream 02 sensor(s) Downstream is fine flucuating between .40-.90
CEL on and Fuel trim code.
Id be so gratefull if anyone could help out, ive replaced in less than a yesr plugs fuel-pump/filter/plugs/MAF/Camshaft magnetic senors etc..oh and last week even went as far as suspecting the ECM and purchased a used one, got it virginized and cloned and still same thing.
TIA.
Engine runs fine/smooth etc. except for exccessive fuel consumption, used to get close to 700 klm/tank...now at 400/tank.
P0136, P0170, P0171 been trying to figure this out forever lol

The only parts replaced in regards to the CEL on were the MAF, upstream 02, and the ECM