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The limited edition is usually the trim and interior package.It is usually a fancier package then the standard ML500 with possibly leather seats,wooden trim panels in the interior wheel flares in some cases,etc.Usually if you take your VIN number and contact a dealer they can tell you the exact specifics of your models limited edition options at no charge to you and can be done over the phone in some cases.
Your vehicle may have the satellite button to engage satellite radio but it may not be complete with the satellite system.Some models came pre equipped with satellite install but needed the completion kit retro fitted to the vehicle.This usually has to be done by the dealer as they have to order in the kit and install it.Usually if your model has the sat button then this can be installed.I know in some cases it can cost upwards of around $1500 or more to have fully installed.
You can definitely install the blue tooth yourself if your vehicle is once again equipped fully with it.To see if your model is equipped with it open the center console between the two front seats and check for an electrical connection that looks like this https://www.dropbox.com/s/nqqqp81d952w6sb/blue-01-13.jpg?dl=0.If it has this connection then you would need part number B67875878 or part number B67876131 blue tooth module to slide onto and connect to this connector as seen here https://www.dropbox.com/s/s0skrx874nufrj2/bluee-01-13.jpg?dl=0.This can be purchased from a dealer or on line in some cases.If you do not have the connector then a dealer would need to install the retro fit completer kit to make this work.Once you have the adapter here are the instructions for pairing your phone to your vehicle.
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