Why the P0056 code is not showing in the Mercedes-Benz codes list?Thx

Question

I have a C300 MB and the engine light on.
Just stoped at Advance Auto Part local store and got the P0056 code.
However, this code is not showing in your list of code under Mercedes-benz.
Why should I do?
Thx

Answer 1

P0056 H02S heater control circuit Bank 2 Sensor 2

This is a gereic code, if you use a generic code reader you get generic code, this does not mean it is not a valid code condition. The CK ENG LT program was created for generic protocals. The code condition you have means the ECM has detected a open of a short in the H20S Bank 2 Sensor 2 which is the downstream 02 sensor or the catalytic monitor sensor.