Retrofit/Upgrade to 2009 Exterior Mirrors
I thought this was a plug-n-play swap, but now I noticed that the new mirrors have a slightly different wiring.

Does anyone know what I need to change to make this work? Any help?
I guess I need a wiring diagram or something like that. So, any help from someone who has done this before would be highly appreciated.
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I would suggest trying to match the option you have on your ML. If you have the memory package then you will want to have a memory mirror. Why? So that all of your options will work. Ie. automatic fold away reverse curbside mirror tilt assist. These are features of the Memory Package. If your seats have a memory buttons (3 of them) in addition to the tilt adjusting buttons on the side of the bottom seat segment, your mirrors are memory also. If not then they aren't.
That said If you can get a wiring diagram for both your ML model year and the retro mirror year and then buy the connecting clip for your ML year. This will be connected to the Retro mirror. Next you can splice the newer mirror's wires into the clip according to the wire diagram for your model. If there are excess wires like for Blind Spot detection which was not available when your ML was built tape off those non functional wires and you'll be all set.








