After you fix the wiring, be aware the lighter only gets power with the ignition switch on (MB design). If you want to charge the phone while parked, you'll need to do some wiring modifications.

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Charles
1983 300D, bought new, 215k+ miles, donated to Purple Hearts veterans charity but I have parts for sale: http://www.peachparts.com/shopforum/showthread.php?t=296386