I just bought my self a new-old car. A Mercedes ML270TD.
My plans are as follow:
Outside: Get some tint on the windows, remove those mud flaps, and get a W163 style grill for it.
Inside: An alarm, my Alpine 9833 Head Unit, my Hertz MLK 165 Component Speakers (I will use the crossovers on the headunit), a USAmps MD43 will power the tweeters and midtones, a USAmps MD2D will power my 2 RE SE 12"