Datum: 23. Februar 2015 16:06
the engine is warm, the air flow rate 12-15 kg.
but you can not just look at this parameter, you need analyze many parameters.
if it stinks of gasoline and thus defective probe indicates "lean" - you need to understand: all cylinders working or not?
if one cylinder is not working, it just transports oxygen in the exhaust manifold and the oxygen sees the lambda probe. As a consequence - ECU enriches the mixture until it stops (+ 25%). This happens rarely, but possible.
My solutions for troubleshooting Mercedes release 93-98:
Diagnose von Mercedes M104 und M111-Motoren mit einem Laptop auf eigene Faust.
Diagnosegerät (OBD2) und Reiserechner für Mercedes Motoren M111 und M104 mit HFM oder PMS auf einem Tablet/Smartphone