Slowstride there are a series of tests to confirm faults if you had the code then some could give you a clearer set of definitions as to which sensor faults to look at.
Some times it can be misdiagnosed and your scan MB can give a false indicator but if in doubt Have a complete scan done rather than a quick test.
My wording has differences as to the U.S but they are the same scanners.
Changed my mind.. I feel like just doing this anyway.
The ecu is able to monitor and identify most drivabilty related trouble conditions,some circuits are directly monitored through the ECU-Feed-Back-Circuitry>In addition the ECU monitors the voltage state of most circuitry and compares those states with expected values In Australia under MB Diagnostic Assistance Systems we use
Filter status All control Units via the ECU to ascertain the values and or parameters that are designated for each open circuits maximum settings, and cross reference back to match the current values for first and last where faults as stored in the ECU.
Although most sub systems of the engine control module are either directly monitored, there may be occasions where diagnostic trouble codes are not immediately identified for trouble codes these are stored as stored and current or sorted followed by a the prefix of -f- = fail and or
stored but not reconsidered to set followed by the leading mark
A specific set of conditions must occur and unless these conditions occur ,a DTC will not set.
This is where the Aussies run a muck every time as to costs involved with MB Australia.
They will spend a 100 dollars just to save a buck and MB is so easy to work with ,if you work with MB and it's systems: Star is easy to understand and a wonderful tool to work with.
Richard