Fuses have all been recently cleaned.

Do you know which sensor this error code covers? (or both)
What is the procedure to check the signal from these sensors?

What is the source of documentation to troubleshoot these codes? ( I have all of the MB paper manuals and the MB WIS software)

I have noticed that since I tried to clear the memory today, the car is behaving differently. Before it turned over immediately. Now it takes longer to start and I have to give it gas. The idle seems very weak.