Restoring the factory settings

buttons Press the buttons and simultaneously for approximately six buttons simultaneously for approximately six seconds until the battery check lamp flashes twice.

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    General notes
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    Notes on MP3 mode
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    Let's face it: If you're smitten by Mercedes' GL-Class full-size SUV, the recent run-up in prices at the pump probably rates somewhere between insignificant and unimportant in your car search. Wit ...