jfiely

New to me 2008 R350 4 Matic. Was going into limp mode. Only code was P0721 Transmission output speed signal implausible when compared to wheel RPM signal.
I replaced the output speed sensor on the TCU. Car drives fine and no more limp mode, however, it is now throwing a code P0722 output speed sensor no signal. Still no other codes in any other system, ABS etc. The OSS live readings are just fine and it’s not putting the car in limp mode - what gives?

My plan is to pull all the wheel sensors and check for debris as I have heard that sometimes these sensor give code 0722 issues.

Anyone had this same experience??

MB mechanic from 1982-1998. Still a car guy….