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WINDSHIELD WIPER AND WASHER TSB Revision EXTERIOR 51-51 • MB991910: M.U.T.-III Main Harness A STEP 1. Use the scan tool MB991958 to check if an ." Q: Is the diagnostic trouble code set? YES : Diagnose the ETACS-ECU. Refer to GROUP 54A ETACS, "Diagnostic trouble code chart ." NO : Go to Step 2. STEP 2. Check the ETACS configuration function. YES : Go to Step 3. wiper operation" to "variable INT" or "vehicle speed . ZC501967 AC404789 AC701411AB MB991824 MB991827 MB991910 Data link |