Mercedes has announced that they are recalling certain models of the 2009 S Class, W221 vehicles. They stated it was due to part number label of the door locks it could be that the front and rear passenger side door locks were interchanged during production. The exchange of a front and rear passenger side door lock would result in a passenger side door that cannot be opened by merely pulling on the interior handle and a rear door lock that can be opened with a simple pull of the interior door handle even if locked.
This situation could affect the safe exiting of a vehicle in the event of a crash or protection of children from inadvertant opening of the rear door. Dealers will check the part number on all door locks and replace any incorrectly installed door lock free of charge. The recall is expected is to begin during March 2009. Owners may contact Mercedes Benz at 1-800-367-6372.