Today I tested a Mercedes Benz sprinter 2011 using Autel Maxisys Ultra scanner.
I honestly thought that the 906 was not compatible with ultra. After consultation, I was told to choose the LD version for mercedes. And I was able to scan it and diagnose the issue.
The Ultra excels at resetting sensors on Mercedes. It performs this task very fast and the vehicle stopped choking out thanks to the parameter reset.
Maxisys Ultra price on OBD2gate.com: