main battery replacement 2006 E350 MB

Nope. Make sure to not short the positive to the frame. Keep the key out of the ignition.

When you are done press and hold the windows buttons for a couple of seconds on full open and closed positions. 

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  • We replace the main battery without disconnecting the small battery without any problem. If you feel safer disconnecting the auxilary battery it takes 3 min. It is under the black cover on passenger side, engine bay.

    Most system will store the setting. You may have to reset the clock and sync the seats, sunroof but that takes less than 5 min.

    1. Open the sunshade by holding the button. When it got to the fully-open position continue to hold the button for another 20-30 seconds
    2. Close the sunshade by holding the button. When it was fully closed then continue to hold the button for another 20-30 seconds.
    3. Repeated steps 2 & 3 for the windows to fully open and fully close, including the wait at the end of each step.
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