E/W214: One Touch Window Open
All other windows one touch open and close. An issue ?
Edit: Found this answer on Reddit which worked
Hold the window switch down to roll the window all the way down. Continue to hold the switch down for about 5 seconds, then release.
Hold the window switch in the up position and allow the window to roll all the way up. Continue holding in the up position for about 5 seconds then release.
Once the window drops down slightly hold the switch in the up position again and allow the window to roll up. Continue holding the switch for another 5 seconds.
Last edited by regor60; Feb 24, 2025 at 04:37 PM.
That procedure resets a window that fails to either fully open or close by a single full depression of or pull up on its window switch.
2024 E450.
Based on other reading I'm guessing this is the procedure for many late model Mercedes.
All other windows one touch open and close. An issue ?
Edit: Found this answer on Reddit which worked
Hold the window switch down to roll the window all the way down. Continue to hold the switch down for about 5 seconds, then release.
Hold the window switch in the up position and allow the window to roll all the way up. Continue holding in the up position for about 5 seconds then release.
Once the window drops down slightly hold the switch in the up position again and allow the window to roll up. Continue holding the switch for another 5 seconds.
That procedure works for many MB models and much older too, like a decade or so ago, its purpose is reset the calibration of the windows, usually what you need to do when it glitches and/or if a battery disconnect is long enough and the calibration is lost.




The voltage available to work the window motor is impacted by in-line voltage drop.
Replace or resolder the DCU Module: either 5mn job or $1000.





