How To Read And Erase Diagnostic Trouble Codes

Required Special Tools:

MB991958: Scan Tool (M.U.T.-III Sub Assembly)

MB991824: Vehicles Communication Interface (V.C.I.)
MB991827: M.U.T.-III USB Cable
MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

NOTE: If the battery voltage is low, diagnostic trouble codes will not be stored. Check the battery if scan tool MB991958 does not display.

Connect scan tool MB991958 to the data link connector.
Turn the ignition switch to the "ON" position.
Select "System select" from the start-up screen.
Select "From 2006 MY" under "Model Year". Check that "Vehicle Information" contents are correct.
Select "ETACS" from "System List", and then press "OK" button.
NOTE: If "Loading Option Setup" list is shown, click appropriate box.
Select "Diagnostic Trouble Code" to read the DTC.
If a DTC is stored, it is shown.
Choose "Erase DTCs" to erase the DTC.